I just found 5 sets on e-bay goin pretty cheap. (1/3 the cost of mine) however, you'll need to check to see if you'd need front and rear... I think these are all single plates.
http://search.ebay.com/search/search...tes&category0=
Kinda blah lookin IMO... kinda look like plates of recent years
Even if your state won't let you run them on the street.. you can put magnets on the back, and when you go to a cruise in or a board meet or what ever... as soon as it is off the public road, you can slap them on and no one can do a thing about it.