I'd suggest getting a Mishimoto. Amazon has them for a good price. MMRAD-WRX-01 should be the one that fits your MY. I'd double check Mishimoto's site.
Since I can't edit, here's the link http://www.amazon.com/gp/aw/d/B001PPFQOO/ref=mp_s_a_1?qid=1302787654&sr=8-1 You may also want to replace your hoses as well.
I have a good one off a 00 outback with 130k...not sure if it will interchange, but I am in Lakeville, you are more than welcome to stop by and see if it looks like it will work this weekend.
how much do you want for it? im just looking for something to replace mine thats cheap and works fine. A new napa is only $130 but i figured i'd check on here first
http://www.amazon.com/Mishimoto-MMR..._3?s=automotive&ie=UTF8&qid=1303262568&sr=1-3 $240, and I believe free shipping.