I have a line on a few good quality Aluminum Radiators for CHEAP. Ive used these in my 2J 240 and on a few WRXs here. Brand name is Mishimoto. An ideal upgrade to the stock OEM radiator, the Mishimoto aluminum radiator will give your WRX a cooler, more efficient running engine. Price is $200+shipping
thats the same radiator i have in my car. i bought mine form ebay. it is an easy install and everything fit perfect.
i almost forgot. since i have an 02 some things changed. the original 02 radiator did not have a cap on the radiator and the new mishimoto is the uptaded version that has a cap on the radiator. subaru has a kit that you get when installing the updated radiator. the update routes the coolant to the reservior a little differently.