There use to be a shop on RT 1 called BOWS and ARROWS around where South Kings Highway met RT 1. The last time I was there was a while ago so I don't even know if they are still there. I justed google northern virginia archery shops and got their link....
http://www.bowesandarrows.com/
I really wasn't too please with them the last time, I really didn't like B & B either, so I usually take my bow out to Hoffman Archery on RT 29 in New Baltimore, halfway between Gainesville and Warrenton.