I'm in Richmond, not NOVA, but I know there's got to be plenty for you up there! Doesn't Sally Fallon Morell live in NOVA or DC?
Anyway, there's a great farm raising heritage breeds on pasture in Upperville. It's called Ayrshire Farms, and they also run a restaurant and butcher shop.http://www.ayrshirefarm.com/
My local butcher shop gets some of their stuff and it's fabulous!
I'm sure there are a million other options, I just thought I'd mention the one I'm familiar with.