Well, since that conclusion beckons some speculation, it is possible that there is a perfectly-preserved print in the vaults of LucasFilm that we aren't meant to know about. We can see from the Blu-ray that they store a lot of prototype props that never made it into the films, so actually physically destroying what George apparently thinks is the workprint doesn't make much sense.
"Empire of Dreams" included the pre-ANH crawl in great quality as well. If we assume the GOUT-crawl was done around the same time, those two clips could be from the same "secret" source.