There are a couple of places out there that sell stainless in bulk, there are a number of websites. They also have complete kits for certain series of trucks - all stainless bolts/nuts/washers for the entire truck. Totally Stainless is one, here's another:
http://www.mmsacc-stainless.com/ You can also go to a marine supply website, they have a lot of stainless, and usually a lot cheaper than the truck sites.
