I've got a caliper that's rubbing on my brake rotor. Somebody said on here the other day that there should have been shims installed with the kit but seeing that there was no kit then there are no shims. Where can I find shims and where would they be placed. I'm guessing between the caliper bracket and the caliper itself. I thought it was set up right this time but when it was pulled out in the street today it started doing the same thing.