Recently stumbled across this nice little tool at the Eat Well Guide web site.
This site is great because it allows you to find farmers, farmer's markets, food co-ops, or other stores that sell healthy beef, dairy, eggs, bison, chicken produce or anything else you are looking for.
The beauty part is that you can screen through whatever sustainable production method you would like your food to have gone through. Anything from no antibiotics, organic, non-certified organic, grass-fed to biodynamic farming where the animals are read bedtime stories and live in the house with the farmer! Okay, I made that last one up, but overall a very useful search engine if you are looking for an alternative to the same old fare.
happy cow found here