There was one of star wars on ebay at one point but had the a new hope in the title.
My biggest gripe is not the new hope subtitle, it is what soundtrack would have been included on these releases.
The theatrical 1985 re-release of star wars was the digital mix by ben burrt.
I have never heard that the THX mixes created for the definitive collection were ever on any film prints. If i had to make a guess it would be the 1985 or the 1977 stereo mix that would have been on the final prints ever made.
As for the gout there can be little doubt that the video masters they digitized were many many generations removed even from first release prints whether original or re-release.
any modern day oot remaster would also have to take in the fact that the original effects were 2 or 3 generations removed from the physical photography on the o-neg since it was all optically composited.
This was a problem lowry ran into on the bond films. and unlike the 1997 special editions of star wars they did not have access to original elements because 1. they were lost in a vault someplace or 2. more likely had been destroyed just like the original star trek effects opticals were thrown out by paramount.
Unlike cbs digital however lowry did not recreate effects using cgi but tried to correct the mismatching footage in digital post after the negatives were scanned.