Not a fly shop, but another real good source for natural fur products is Paulette Fur Co. They sell via Ebay. I've purchased their craft grade fur products, whole tanned hides, several times & have always been happy with what I've gotten. I cut them up anyway to tie with them so craft grade is what I buy.
They have better grades too, but the prices will be higher. Shipping prices are not cheap, but IMO fair when combined on multiple purchases.
Depends on what you're willing to spend.
Paulette Fur Company L.L.C. - Home