> I've been trying to locate a source of sufficiently thin leather.
Make friends with a local book-binder. They use very thin leather to
bind old books and to restore bibles. They also have a synthetic leather
look-alike that is also very thin. Also, I think it was View Camera
magazine that published a "build your own bellows" article awhile back.
You may want to check into that as well.
Paul A. Lehman