Boof, the only true white horses are 'Overo Lethal White Syndrome' foals who are born with a terminal genetic colon problem, and die after a couple of days...
Chuckles aside, thanks for your comments.
I was hoping to get information, or leads toward Australian zebra breeding programs in our zoos, as stringent Australian bio-security conditions and restrictions (which I fully support and agree with) add tens of thousands of dollars to the price of importing live equids and or their live 'products'. This rules out all overseas breeders I have contacted.