Leon Valley trading company usually has some on ebay, I hatched a few out a couple yrs ago, most were roos gave them away and the pullet didn't make it through the winter here in IA, very skittish bird pretty though.
I have bantams that are very similar to the white face - I wish I had some hatching eggs to send you - I am just now testing for fertily I have 3 eggs set under a broody cochin right now
I have WFBS 2 hens, but have no idea which eggs are theirs. If I ever happen to see one or the other in mid act- I'll grab the egg(s) and get in touch with you.
Lisa