I think that a .45GAP by KT would sell like hotcakes. Make it a single stack, 6+1, and put it in something about the size of the P40, and you'd have a winner. I'd buy one in a heartbeat. Almost all reviews I've seen of the .45GAP, in both Glock and Springfiled XD, have been positive reviews, both for ballistics as well as accuracy, controlability and comfort.