If your going to RDU, Aviall is in Morisville close to RDU airport. They tend to cater to the big maintenance shops, but they will still sell to us little guys. Some of their stuff needs to be bought in bulk (100-200pcs) like screws and nuts depending on size, but you can find a lot of stuff in homebuilt size quantities. I've bought proseal, alodine, aluminum, nuts and bolts from them.
They're no Aircraft Spruce, but they're local I still check them first before I order off the internet.
Greg
RV-7