Can't help on Fuji, but stay in touch with Michael Kadillak. Kodak may be including 6 1/2 x 8 1/2 in its TMY custom cuttings.
Now that's a tough one. You are the first person I've read discussing 6 1/2 x 8 1/2 and color in the same thread. Personally, I look at this as a format for the long haul, and expect that color sheet film in general will become extinct before black and white "whole plate" film does.
Bookmarks