If you really, truly want to get true Ameraucana's, I would use the lists of breeders on their sites to obtain good birds or eggs to hatch. Both of these sites have lists of breeders:
http://ameraucanabreedersclub.org/faq.html
http://ameraucana.org/
When you are interested in a particular...
Easter Egger. Often sold as ameraucana. If they don't come from a reputable breeder, they are almost always EE's. These sites may be helpful to you:
http://ameraucana.org/Photos
http://ameraucanabreedersclub.org/faq.html