You're likely going to have to buy a whole chicken. The only time it's feasible to break down chickens and sell off parts like that is if you're a large-scale operation that uses conventional production methods. I mean, if you eat 2 chicken breasts, that one chicken. What happens to the rest of the chicken?
I buy whole chickens from
http://www.klassewoodsnaturalfarm.com/chicken.php and I have for years now. Super good! But they do come frozen and are larger roasting chickens - typically in the 2.5 to 3.0 kg range.