The Bianchi 5BH is still available in a small frame 3" size, check a vendor such as OpticsPlanet.com. Or keep a close watch on Bianchi holsters on eBay.
If you have some time,watch for a Bianchi 5BL, an older holster that carries the gun in a slightly lower position that is a little more comfortable.
Another option would be Tex Shoemaker Leather. They will build a thum break holster to your detailed specs for a very reasonable price.