I don't know if there is one ~ your best best is to buy from a private breeder. To locate one try the Ameraucana Breeders Club ~ there are also some good breeders here on BYC. Do your research, ask questions and make sure that you see photos of their parent stock if you want pure Ameraucanas.
I know Jean Ribbeck, soon to be the president of the Ameraucana club, will ship chicks and young stock. She goes by pips and peeps on here, and also has a website. Look her up, you'll be happy you did. She gave me some eggs this spring (beautiful blue ones!) and I hatched some GORGEOUS chicks, which were tough to part with. I especially love her whites, wheatens, and buffs. I know buffs as a variety need more work but BOY she has some gorgeous deep buffs. Every time I see them at the show I stop to drool a moment.
