I buy from Dave Waters, our Countryside rep. He adds a couple of dollars to the "store" cost.
http://www.countrysideorganics.com/home.php?cat=4
The grinding is what got to me. By buying scratch, alfalfa, kelp, Nutri-balancer, and peas from Countryside and then adding other grains from Three Rivers Co-op, it wasn't TOO unreasonable, cost-wise, but my flock wouldn't eat whole alfalfa pellets or peas, so there was SO MUCH grinding. I couldn't keep up. They did seem to love their feed, though.
I saw on the whole-grain thread that there's a reasonable grinder on the Premiere One site, so I've been thinking about revisiting whole grain feeding again...
ETA: I still have a TON of Nutri-balancer and peas if someone wants to try a small batch and doesn't want to invest in a whole bag.