I also buy full rawhides from Tandy Leather. They have whitetail, calf, and goat... all good for backings (the goat hides are a bit small, better for drum heads). A whole WT hide usually costs $80-$100, but you can get about 8-10 matched pairs of 2" wide backing strips, usually up to 40" long. And it's nice thin stuff, not those thick yucky dog chew things.