I have MAC lower and upper control arms in the rear of an 88GT. The bushings that go to the rear end are shot on the lowers and they are telling me that I cant replace them and need new control arms. I find that rear hard to believe, since the oem bushings are probably the same size. There are no Auto part stores that can get the oem bushings so where do I find new ones. Does EnergySuspension or Prothane sell these individually, and if so will they fit the MAc lowers?? Any help on this one. Thanks guys......