FIST also advertises that they'll make just about anything. I've used one of their holsters, and my wife is looking at their women's designs. She, too, likes the idea of a properly canted paddle holster, spaced properly to keep from digging into her because of her hips. Good luck. If you do come up with something, there are a LOT of women who could use a heads-up from you.
Please, don't be shy about sharing here.