First of all, well done on the comparison shots, I always like that sort of thing to show some of the choices that were made regarding the framing of shots.
One problem though, the mattes in the screen themes set are nearly all cropped, which would really limit any use of them to show more. It's quite surprising how much of matte paintings are sometimes wasted anyway in framing, but why Screenthemes cropped everything to 4:3 I don't know, it's very annoying.
I've got scans of some of the original mattes at pretty high res, with the painter's rough work off the canvas still showing, which is quite nice.