For anyone interested in that "diamond plate" look this might be interesting. While searching for Synthetic Suedes I stumbeld across this company that offers a number of very cool upholestry and vinyl fabrics for automotive and marine applications.
I think a few people have looked into diamond plate walls. This might just be the ticket. $13.95 a yard and 78" wide. My buddy is considering covering the walls of his Itasca in this stuff.
http://shop.store.yahoo.com/yourauto.../chdiplto.html