Brake Noise

When I turn left and go over bumps. My brakes make noise. Like the pads are shifting around causing a clanging noise. Kind of what a loose rim hub would sound like. After inspecting the brakes, it looks like I may need a new caliper bracket. The inside pad has worn a pretty good chunk of the metal on it away, where the pad arm meets the bracket. I beleive this may be causing the pad to shift slightly and make the clanging noise. Can be described as slightly rattling a penny in an empty coke can. But not much. and only when turning with bumps. Problem is, I cannot find ANYWHERE I can get just the caliper bracket without blowing a big amount of money on loaded calipers.
Does anyone know where I can get just the caliper bracket. I have exhausted all my known possibilties.

Thanks...
-TomV