Saw this on ebay today,

Probably a little too far gone for the street but would make a solid base for a race car...

http://cgi.ebay.com/ebaymotors/Mazda-Other-Rx3-Mazda-Rx3-Sp-/261189311246?pt=US_Cars_Trucks&hash=item3cd0189b0e

 

unless you plan to replace most of the body panels with fiberglass i would pass on that. unless you can get it for under $1500 lol