Need Advice. Radiator Leaks/ fins bent.

Hello everyone.

First of all, I hope I've posted this in the correct section. Forgive me If I haven't. I'm ok with it being moved to its correct forum section if need be.

Anyways, I own a 03 Dodge Durango. This car has been great to me since I purchased it used from a buddy just over a year ago. It's fulfilled its job quite well, while sparing me any headache. However, just yesterday my car overheated on me. When I got home I inspected its radiator and found that this part was to blame. It showed signs of leakage and a majority of the fins were severely bent. I know that replacement is my only option at this point, but before I do so, I'd like some advice. I've decided to purchase an aftermarket version online, but don't know which companies are reputable. I've found two that I particularly like but before I buy from one of them, I'd like some sort of verification that they are a legitimate business. I almost never buy anything online so I don't know how to spot a scam, and I can't afford to be scammed.

Has anyone dealt with either of the following companies and can verify that they are a legitimate company? The parts on each site match the OEM number of the part I need.. Thanks in advance.

http://www.acpartshouse.com/showitem.aspx?id=122312&googwd272535
or
http://www.radiatorspot.com/dodge/durango/radiators.html#MjAyNjY