Just posting this in case anyone hadn’t read it. The Library Of Congress has a nice 2K scan and carefully preserved 35MM prints.
http://mashable.com/2015/12/17/star-wars-original-cut/#61CxHJ2VbiqL
I wonder how they determined their color correction.
Well this is certainly news to me. I thought George refused to give them anything but the SE. Here it says that they’ve had “negatives” since the theatrical releases. The author doesn’t seem to have any technical knowledge about film. But this certainly seems interesting.