Here's some info on them: http://www.feathersite.com/Poultry/CGA/CalGray/BRKCalGray.html
http://en.wikipedia.org/wiki/California_Gray
http://www.thefreelibrary.com/Endangered+chickens:+the+California+Gray-a018518047
I believe Welp, Privett, and several other hatcheries have them.
Supposed...