Zombie, have you managed to get those '77 in theater Belbucus photos? if not, you have four of them posted on this page:
http://originaltrilogy.com/forum/topic.cfm/Star-Wars-Colortiming-Cinematography-was-What-changes-was-done-to-STAR-WARS-in-93/topic/9805/page/2/
And here's another one.
I would really like to see the rest of them though, if they even exist.