Go to:
http://www.car-part.com It's a nation wide wrecker search engine.
Put in the part you want and your search area. For a motor like that you might wanna select USA for the entire search area as they are not gonna be easy to find.
I searched 99 911 Engine only found 2 in the USA at wreckers, both 15k
Year
Part
Model Description Miles Part
Grade Stock# US
Price Dealer Info
2000
Engine
Porsche 911 031306 $15000 Action Auto Wreckers USA-NY(Massapequa) Request_Quote 1-800-562-8811 Request_Insurance_Quote
2000
Engine
Porsche 911 w/o elec op ful inj- COMP,W/ACC,3.4L,MT-EXC. B303 $15000 M & M Imports - Southern California Shipping only USA-CA(Fontana) E-mail 1-800-429-9000