I can't see why they wouldn't release the OUT eventually.
Unfortunately, I fear impossibility is a real...possibility.
Especially since unlike many directors interested in preserving their legacy, Georgie is likely to be uncooperative in any earnest restoration/recreation project.
Disney: "Hey George, can we see your Technicolor print?"
GL: "What for?"
D: "Just for reference: you know color-timing, wipes, etc.
GL: "What, you mean for a resurrection of my awful horrible no-good rough draft of my perfect, sublime, epic masterpiece: Star Wars Episode IV A New Hope Extra-Super-Duper Special Edition???"
D: "Yeah, that."
GL: "Go to Hell! Over my dead body, which will be cremated along with that monstrosity of a rough cut!"