That would have been kind of cool to get his reaction. He certainly has never referenced it from what I have seen, and he keeps saying the film is lost, so it's not like he started saying "actually, Lucasfilm found at least part of it for the DVD but they are holding on to it." Or maybe he does know--he would still be able to say that his VHS is the only available copy of the film, since the negative is inaccessible.
I think the problem is that if he went to Lucasfilm and said, "hey, do you think you could make me a high-def copy of that negative you have there?" they would simply say, "no, it's ours." It's a valuable property and probably will be saved for a Blu Ray extra to help sell the set, and I can't see why they would give it away to Davis to make money off doing convention circuits, except maybe as a promotional piece for the set when the time comes.
I would say Steve Sansweet might be another guy to ask, but he's full of shit anyway so I'm not even sure if he would give us a reliable answer.