Not likely to ever find any in the US. Some were imported, but didn't do well and I don't think anyone ever bred them.
The closest your going to find are Libyans, T.g.cyrenaica CBB in the US.
I keep 2 libyans, and I am in So Cal. I'm new to them and still learning. They are outside pretty much all the time now, but I brought them in at night over the winter. I'm hoping for some eggs this year. If I get some I will let you know!