You might try going to Anchor Bay's website where they have a suggestion link. It might not work but it doesn't hurt to try. Nichsolson also made a film around this time (DRIVE, HE SAID), which hasn't been released but the rights do belong to Nicholson.
I'm not sure how true it is but I heard somewhere that Hopper owns the rights to THE LAST MOVIE. I believe there was a rumor at one point that Anchor Bay was going to release it but nothing ever came of it.