Look at Remora holsters-I own a bunch of them and they are not only excellent IWB holsters, they are the most comfortable and easiest to use.
They're having a sale right now and everything is 35% off. They don't cost beans so ya oughta give one a try.
Looks like a size 10 would fit.
I'm ordering one for my C100 today, already have them for a PF9-laser, P3AT-laser, CW9-CW40 and an SD9VE