You can also try craigslist for auto parts. Many of my friends have bought parts for their cars like that. A lot of people who total their car just strip them for parts and sell them. If you're lucky you can find an almost new part or close to one for dirt cheap. Just a tip, but definitely do not buy an over-used radiator, it's your engine you're talking about. That sucker overheats, you blow your head gasket and warp the head, oh man too much headache. Invest a bit more but have a peace of mind!