You should try LMCTruck to locate the parts. When I went to install an amp in my '91, I needed to pull the seatbelt on the drivers side up. It's a pretty big socket, and it's at a pretty high torque spec, so be prepared for that. I never did get the front seat belts removed to do the install, but I worked around them. It looks to be a relaivley straight forward process however. Shouldn't be too hard...