GMC is right about the variety of GMC interior colors, but Chevy was not far behind. Regular interior (Pearl Beige and Brown), Deluxe Equipment option interior (Pulsar Gray and Gray/Maroon), and two, two-tone Deluxe Cab option (Blue and White; and, Green and White).
As Xram53 said, Jim Carter's has the widest selection of cardboard panels and frames and should be fine for your colors. His 1954 seat upholstery for deluxe (maroon/gray) is not correct (his is just maroon) and he does not have maroon cardboard door/side panels (used in the Carryall Suburban; not sure if they were used in the Deluxe Equipment option pickup).
Also, Jim Carter's stainless steel frames for the door cardboard do not fit the cardboard (and some screw holes were in the wrong location in some cardboard I received from him). I had other problems with his cardboard headliner (cut too small) but it was for the '54 Suburban.
Tim
