As Bryan suggested, I would contact James Davis and see what he has available. Then I would start scouring flea markets and estate auctions for others. The problem w/ buying something online that you can't inspect closely is that you might get what is known as a "frankenplane". That's one that has been created by taking spare parts from various other planes to assemble a "new" one. It may look good in a picture, but if the parts aren't a perfect match, it won't perform very well.
HTH
Bill
I think for frankenplane, it's the resale value got hit the most