Where can I get a new A/F sensor for a good price? My brother pretty much stripped the whole thing and itll barely screw in anymore. I checked at Kragen and they were charging $211.99.

 

Are you talking about the O2 sensor in the header/exhaust manifold? If so your best be is to get it from the dealership..its about $230 but its the correct part for the car. When you install it, be sure to put some anti-seize compond on the threads so it wont seize up again and get stripped if you need to remove it later.