I was able to buy 2 wheels fpr my 2001 Boxster from
www.car-parts.com for 150.00 each. You can also try Keystone automotive they repair and refinish damaged wheels (many locations but the CA facility is the biggest). There are also ads in car and driver, road and track, etc for others that repair damaged wheels. Last source is E-Bay......I've been able to find some very odd items that I needed from e-bay at very resonable pricing.
Good luck!
Joe D.