ISO Parking brake assembly for a Lehman Monarch kit, disc brakes, fitted on a 97 GL1500A. I have a complete assembly installed but the shims are gone and I can't find specs or replacements-- the manufacturer is gone, gone, gone about 30 years ago. Any help will be appreciated, even a parts code for the shims or a complete assembly. Anyone have an installation manual for the Lehman Monarch kit? Parking Brake was an option.... TIA