Watch for automotive swap meets in your area. They usually have someone selling plates. A local club newsletter is a good place to track swap meets. There is one every year in Sacramento that is called "The Reno Swap Meet" (http://upcoming.yahoo.com/event/6587071/CA/Sacramento/Reno-Swap-Meet/Arco-Arena/) since that is where it originated (years ago with Bill Harrah). Also check with the Towe Museum and see if they are holding any swap meets in their parking lot.