fishmanlee said:

http://www.youtube.com/watch?v=LHy0o3S6zU0

V.2 of my Reconstruction of the deleted scene of luke building his new lightsaber ...

It is not certain that the scene was actually deleted. More, not completed.

The droids were shot, standing outside the cave looking in. C-3PO and R2-D2 talked with eachother, but not with Luke. This was done late in the production. Anthony Daniels has told me this personally.

Mark Hamill has said in interviews that he was never part of shooting this scene and that he never provided dialogue for a stand-in.

The origin of the Elstreeprops ROTJ lightsaber that comes apart is dubious. It is likely that it was never part of the movie production at all. We do know, however, that the original "hero" prop was modified after the "I See That You Have Constructed A New Lightsaber" scene, to have a higher control box with a circuit board that can be slid out, revealing electronics inside. The "hero" prop in this state is the one that is showcased in Lucasfilms various exhibitions and is the one that Master Replicas has replicated. There are pictures of the "hero" here: http://www.partsofsw.com/jedsab.htm

Anyway.. If someone still wants to create this scene with a new actor and a lightsaber like the one from Elstreeprops, then there is someone (outside Elstreeprops) who is building replicas of it: http://www.therpf.com/showthread.php?t=77321 . If one could not be bought, then perhaps one could be borrowed from one that buys it...