WhiteRook , Did you ever find what you needed . I've had many Brisons for many years and the only parts that cant be sourced or fabricated are the crankshaft, rod , case . The crank can be straightened if bent .The bearings can be replace easily with exception to the lower conrod bearings on the twins . The pistons/cylinders are either Sachs or Mahle . Let me know what you need I may have it .