I think what jrinlv means is that he has purchased a set of calipers from a 1986 944 and is asking the breaker to also sell him the caliper mounts but he says they are not there, "he dosen't have rear caliper mounts(even though he sent me his calipers and rotors)".

jrinlv, the confusion is because the '86 has the aluminum rear trailing arms and the bracket mount is a part of the cast arm. It is the early cars, 83-85, that have the bracket mount that will bolt onto the arm. You'll either need the whole '86 rear trailing arm (that includes the mount) or you can use the bolt on mounts from the earlier cars.