You might check the links on this site, there is a large listing of parts suppliers.
But here is an idea: find an upcoming swap meet in your area, and call the vendors and see if they are planning on coming out to it. If so, have them bring along what you want, that way you save on the shipping cost. Carlisle and Hershey PA have large swap meets coming up, if that is not too far from you. I know Jim Carter goes to Carlisle.