What you have done there is very good (especially working around that nasty frame crack) there is some exciting software out there for sampling textures from still images and applying them to damaged and even monochrome moving images.

I can't remember where the link is (I will look again).

There were quite a few full colour production photographs taken of the deleted scenes and maybe these can be used to improve the quality (assuming that Lucasfilm hasn't hidden a mother lode of full quality out takes which they are sitting on for the 8D 2084 hologlobe release).