Are they vented or solid rotors ?
cast iron or aluminium calipers?
cast iron should be XB-C maybe D alloy after that untill XF using vented rear rotors
then ford went to a soild rotor, alloy callipers
You will need to get Exchange recond. ones at around $150 each from a brake shop.
you could take the pads out of one side and go to a brake shop /parts store and use there catalog to id them.
Im using XF calipers on XC mounts with XC pads!
it all works good as the outside pad is the same on all XB-XF rear callipers its the inner pad which is more model specific But i fixed that