Lone Wolf, Kustom King, and 3 Rivers has them. I like the ones Kustom King (and I think Lone Wolf has them also) sells--larger and seem to stick better than the ones from 3 Rivers. Leather works for a strike plate/rug rest also.

If you are wearing any of them out quick, most likely there is a problem: sharp leading edge on a feather, bad release, or wrong arrow spine. I can't remember how often I change mine out, but I'm sure it's not more than once a year, maybe two years. The one I have on my longbow now has been on it several months and looks brand new.

Chad