As I told you D_J, Quad like covers may fit your theatrical restoration set like a glove... Just a mock up... Not too much to add though than "theatrical edition" + "Dark Jedi"? next to the logo, and refresh the film credits with High res ones.

The original shot isn't huge resolution (here it's at 33% and a little sharpened to show it here) but it is the only shot I know of this painting with its true colors. The best RotJ poster imo.

Possible that the image as it is displayed here is a little cut on the right.