If you used a US Postal Money Order, you can contact your Postmaster about filing a mail fraud complaint. For that matter, if you mailed him the MO through the USPS you can file a complaint as well. With the USPS MO and mailing, the Postmaster is a little more aggressive in their pursuits. I always try to encourage anyone purchasing from me via the internet to use either the USPS MO or recently I've even began using Paypal. I've conducted probably three dozen sales via the internet of my used parts and so far everything has gone great (knock on wood).
Public embarassment will usually work wonders too. Have you tried advertising the rip-off on the Corral?
Good luck.
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Jeff Chambers
Trophy Stock #3
11.97 Seconds / 114.5 MPH
Chambers Racing Team