Some time ago a sabre enthusiast decided to do a limited run of these sabres. It's design intrigued me, but I didn't have the money in my budget for a machined sabre, so decided to do it myself. Soon after that, a discussion turned up on a message board, arguing the merits of either a machined sabre, or one constructed "hardware" style (from items easily aquired at a local hardware store). What better motivation than to establish machined sabres DO NOT have the definitive edge.
I deviated somewhat from the design, to make this sabre uniquely my own. The only thing that sets this off as hardware design, is the sink knob as the pommel. I was originally going to fabricate the pommel out of PVC and epoxy putty, but got lazy at the last moment. I don't think it detracts from the overall design and the black color ties it to the subsequent TPM design.
This is the sabre used by Obi Wan in "The Phantom Menace". It's essentially the same as the one used in "Ep II: Attack of the Clones".
This is the sabre Obi Wan uses in the third episode of the "Star Wars" saga. It supposedly represents the sabre he also uses in Ep IV. It's not. Unlike the small changes in his sabre from Ep I to Ep II and Luke's from Ep IV to Ep V, this is a completely different sabre.
Well, I got impatient and decided to just finsh the sabre. Rather than fabricating a new pommel, I just used a resin one I'd aquired for use with my Ep IV version. I aslo used the Graflex clamp and calc bubble activation strip cast off from that project. Now it's a sort of hybrid of the Ep III and Ep IV versions of the sabre, with one notable exception... Since the emitter doesn't have the "ring of holes" detail from either version, it actually looks more like the stunt version of Luke's sabre from Ep VI (which was originally constructed for use as Obi Wan's sabre in Ep IV).
Never satisfied, upon the completion of Ep IV sabre, I decided to revamp this one. I started with the emitter. It's assembled from a sink drain flange, assorted PVC connectors, and covered in chrome mylar film (except for the flange, which was already chrome). Beyond that is the neck/windvane assembly, constructed with the usual assortment of PVC pipe, connectors, and styrene sheet. The forward grip is effectively unchanged. 
I've added the Graflex style clamp and associated details, including a REAL set of calculator bubbles I took off another sabre I'd built (which has been scrapped for parts). Unfortunately it's a NINE bubble strip instead of SEVEN, but it looks okay apart from that. 
Here's a closer look at the pommel. It's a resin piece I'd originally aquired for the Obi ANH sabre, but next to the hand made "gear", it looked a bit small. I cut off the stepped portion on the "gear" side, and replaced it with a ring cut from a 1" PVC connector. The domed end was ground flat, so that it resembled the ROTS version a little more. Finally, I covered the whole thing with more chrome mylar film.
This is my first attempt at replicating Obi Wan's sabre from the first "Star Wars" movie. Pictured here is the forward grip (sump pump drain hose), the "clamp" (a 1" PVC connector dressed with a square Plastuct tube, I-beam, a lever cut from more square tube, and clear rubber bumbers for the activation buttons), and the rear grip (Plastruct T-track).
The white pieces at the bottom and top are only for the purpose of the piicture.
After shelving the project for several months, I finally got motivated enough to finish the darned thing. Not only is it not 100% accurate, but it actually looks more like a hybrid of Obi Wan's ANH sabre and Luke's from ROTJ. Not too bad for a first attempt though.
Well, here's something I'll never do again! A scratch built grenade body/forward grip. I sculpted the rings from epoxy putty and ground them into shape, and then cut in the grooves that run the length of the piece. Very dusty work! 
The forward grip temporarily assembled to the clamp area, rear grip, and pommel mount.
The new version is now only missing the Graflex clamp and pommel. The vast inaccuracies of my first attempt are still fairly obvious by comparison.
An end view highlighting the emitter detail (including one of those pesky blue crystals). 
Due to a miscalculation while laying out the forward grip, the whole sabre ended up a bit too long. I decided to forgo absolute accuracy and shortened the grip by one ring. 
The view from the emitter end shows another change to the sabre. The inner ring of holes and blue crystal are no longer present, and instead replaced by the head of a 3/8" carriage bolt (painted black). While it's not accurate, recent research has shown that the inner holes and crystal weren't either.
Here's a pic of the newly chromed pommel to the Obi ANH sabre. I applied silver chrome mylar film to the "cubes" and the spaces between for durability, and Bare Metal self adhesive foil (it's sort of like gold leaf) to the steps next to the "gear" and the rounded over section on the endcap side. It's not perfect, but it's still better than even the shiniest of silver paint.
Now that I've completed the sabre for the "Build Your Own Obi Wan ANH" page, I decided to revisit the old one. The first thing that went was the Graflex style clamp. Actually, it went to the other sabre. Then I decided I'd replace the neck windvane assembly. Luckily, I didn't superglue the nut on the carriage bolt that held it place. During the process of removing the assembly, I managed to break off the first "ring" of the forward grip. Fortunately, it was flat on one side and needed to be fixed anyway.
The final "ring" on the sabre has been replaced, and the entire forward grip/frag body repainted. The emitter has also been modified into it's final form. All the pieces are temporarily assembled around the 1/2" PVC pipe that will become the neck.
As you can see, I've now rebuilt most of the neck/windvane assembly. The "shoulder" was made out of a 1/2" PVC connector, cut down, beveled on one end, and notched on the other. The "vanes" are sections of styrene T-track glued into the notched end so the "base" of the track is flush with the outside diameter of the connector. All that remains to be fabricated is the windvane's sleeve. Also of note is the "extremely rusty" weathered paint job of the grenade frag body/forward grip.
The neck/windvane is now complete. While the section by the emitter remains bright brass in color, from the windvane back to the frag body/forward grip has been weathered by alternately misting red primer, gold, and a little flat black spray paint. It's not really visible in this picture, but I've placed a blue crystal in the center of a washer that acts as the "reflector" in the base of the emitter.