My mechanic quoted about $1200 for the job because the kit he found was $600. NAPA (what he uses) lists a kit w/water pump for $650 to me...NAPA's site it is a CRP product. I looked up CRP and found two kits listed for the 2003 Sorento (both w/pumps; one w/seals other w/out) that had very similar part numbers to NAPA. I found the CRP part number at Amazon for much less. Anybody have experience with Amazon's parts? Should I be concerned. I'd appreciate your help.