I phoned Z Power today to order the last few bits I want for my Z and was a tad disgruntled to hear that one of the crankshaft oil seals (can't remember which one, think it was right) is no longer available, same goes for rear master cylinder piston/seal kit. Anybody know where I can get these items? Bike is a 1980 (79 model methinks) Kawasaki Z650C3. TIA