Here's an old thread on a radiator upgrade. Kinda on the pricey end but ... the stock radiator is NOT designed to handle the added heat of S/C. Upgrading the radiator is usually part of the S/C install process.

http://www.vehicross.info/forums/sho...light=radiator

There was a thread about a year ago with someone selling an aftermarket radiator but I couldn't find it & can't remember who was selling.