I know your on the other side of the water from me but if your in norfolk ever there is Tidewater Fasteners ( Screw Products i think is what they are called now )
2314 Ingleside Road
Norfolk, VA 23513-4546
There is also another place is in Ocean View its a hardware store that has tons of bolts and such. Not sure of the address...
I think your best bet would be the Dealer