Do they check the calipers(core charge refund) well at autozone? Could I purchase some Mazda6 calipers and hand them my MSP calipers?
You don't want autozone calipers! The duralast brand is only good for batteries and wiper blades. A1 cardone is the company that rebuilds most auto parts. If it's a1 it should be ok, duralast is no good. Especially on brake parts. Best option is to get new or rebuilt calipers from Mazda or upgrade to something better.