I hope you find a good VHS/LD copy then, hopefully SilverWook will come up with something good, he said he will give a LD to DVD transfer a shot in one of the preservation topics, I'll hold my thumbs! I think it is a underrated masterpiece far ahead of its time. Beautiful stylish photography, great Sound Design by the genius Walter Murch and a fantastic score by Lalo Schifrin with great acting performances from Donald Pleasence and Robert Duvall just one year before his big break in The Godfather. Great film by Lucas at a time when he was a director.
Ok, back to the topic, I'm surprised no more footage like the clip we saw on youtube of the screening have surfaced, there seems to have been several cameras in the audience. I hope it does, it would be great to see more of it.