Is it the body mount or the washer on the bottom that holds the bottom rubber in place? Or are you talking about the mount that is riveted to the frame? If it is the bottom washer you can buy them from GM, and mabey aftermarket but not sure. if it is the mount on the frame I would try finding a used one but I think you can still get them from GM too. You can also buy Energy Suspensions or similar cab mount kit for under a $100.00, it comes with all six mounts but no bottom washers or bolts.