I prefer to rebuild my own "cores". That way I know the history of the calipers. I have seen some crappy rebuilds, welded, bent, worn areas from lost pads, rusted pistons being reused, stripped bleeders, beatup from being tumbled/mishandled, mismatched castings and holders. I am used to rebuilding the calipers on my Toyota trucks, they can get expensive to buy remanufactured. And when you are dealing with 2 piece calipers on Toyotas you almost never get matching halves let alone matching left to right. Just me being picky with my brake systems, sorry.
TonyJetta, thanks for the link. I will call them and see if they come with holders. Pictures show holders but the description says otherwise.