I've looked all over. 1984 M1008. I've tried calling it a c30, k30, k3500 . Can't find anything. Has anyone bought a REAR BRAKE BACKING PLATE for this vehicle? Mine has "BENDIX 3207587L stamped into the back of the plate. The Bendix website does not recognize this number. If anyone knows for sure how to get one, NEW OR USED, please advise.