If you check around, you might find a radiator/AC shop that will do well by you - I've got one up here that I deal with, and they're called AutoLand (they used to be RadiatorLand.) They're where I get my radiators, heater cores, condensers, evapourators, and stuff like that - good prices and easy to deal with.
You might want to "let your fingers do the walking" for stuff like this - it's easier (usually) to get any sort of warranty out of a local shop, and you can get it made right quicker.
Failing that, I'm sure you could dig up Quadratec, Crown, or any Omix-Ada distributor.
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