Craft and fabric stores: "Santa Clause beard"
Party stores and balloon shop have all kinds of that Iridescence mylar stuff
Check in (regularly) with anyone near you who does taxidermy (including the web).
Look into 'primitive living' and 'paleo' websites and forums. Wealth of info on how to process hides, skins, etc and a large pool to trade in.
Don't overlook things like Braintan.com: Natural Hide Tanning and Leathercraft
, and leather suppliers. Rabbit skins are cheap by the bale of 20.... wiat, I just read stuff about kool-aid dying.