Check out Side Guard Holsters. I don't have experience with their OWB holsters, but I've been using their Quick Clip IWB holster for several years and it still works great. They do offer a crossdraw holster, IIRC.
It's been a while since I've ordered from them, but you can select the cant you want.
Also, they're generally inexpensive compared to some other holster makers, but the quality is very good, IMO. They do have a long wait, though. Last I heard it was about 12 weeks.
I'd suggest contacting them and see if they can make what you need.
Side Guard Holsters