Planning on replacing a seized caliper on my passenger rear and buying from http://www.rockauto.com/catalog/raframecatalog.php. But, I'm unfamiliar with these non-oem brands.

Does it matter which company it comes from (A-1 Cardone, Centric, Raybestos, Nastra, Wagner, etc)?

Also, would it matter if I bought an AWD rear caliper for my RWD coupe?

 

I would honestly go for a used OEM caliper. They are cheap and readily available.

 

I'm a bit wary about buying a used oem caliper unless it's been rebuilt. I'm afraid it will seize again.