We need a birthday thread! Mine was Monday.

About hub caps...I see them often at swap meets and on eBay. ALWAYS look closely at the condition. Many out there are pretty beat up. There's a relatively flat area around the edge that gets hammered during installation.
I bought a set on ebay cheap that are not worth the effort to restore. At least they are good for Garage Art.

Prices are all over the place. Be patient, and wait for a good set at a fair price.