International Auto Parts is a major aftermarket supplier, like Beck Arnley. A lot of AutoO'PepCheckerZone stores sell them. I think for consumables like brake pads/shoes, fuel filters, etc they're find. I wouldn't use them for engine/transmission, etc. parts. IIRC, I've got parts from Jbugs and CIP that were in IAP boxes.
Ok. I noticed on Rockauto that some items said IAP and then in the description said TRW or KYB. In that case are they the actual name brand imported or distributed through IAP and then to places like Rockauto (or Jbugs in your case)?