Emails heading everyone's way...
Cost of the hides vary. You can get full elk hides in the $120-150 range, or partial hides for a premium. Moose and buffalo will run more and cowhide less (but the hides are bigger so it'll run you about the same).
If you're looking for some other ideas drop me a line and I can talk you through some of the more interesting ones and/or send some pictures. I had a post with a whole mess of them in the Sponsor's section, but didn't "ttt" it or have time to make more for sale, so it was deleted in the last purge.