STENDEC said:

Say, just something that occurred to me that I thought I'd ask and this seemed to be the right thread to do it.

Has anyone heard about Technicolor prints of ESB and RotJ being out there in private hands? Were there even any Technicolor prints made of those two? I hear a lot about the various privately owned prints of SW but I haven't heard of any existing for Empire and Jedi.

nope, no prints were made. Technicolor was on its last legs even in 1977 and closed down the following year, I believe.