I know that there is a plant sale at Holy Comforter Episcopal in Decatur that sells heirloom tomato plants- check out the thread on the GA gardener's forum. Might be a bit of a drive for you, though.

Your other alternative is to order online. There are a couple of businesses in Alabama that sell heirloom plants online.

Fusion

I've ordered my heirlooms from a company called Seed Savers Exchange. You can google it. My students read a story about the history of this company and were very interested. I built a grow light system, 6ft X 5ft, ordered about 8 different kinds of seeds and they are all up about 2 inches now. They even have seeds from Thomas Jefferson's original stock. Does anyone have a recommendation for a sweet, small, heirloom onion?
Happy Gardening~Brenda in Thomasville, Georgia