part needed mkIII commando.

I am looking for a r.h. exhaust pipe for a 1975 MKIII commando (conical seat flange). I noticrd on the So Calif norton club ride today mine is beginning to crack near the crossover stub. I would like one in in good used condition. TIA.
Bill Edwards Simi Valley CA.
whr44edw@aol.com

cracked header

Bill,

Must be a right pipe gremlin loose in California. Reassembling my '72 750 last weekend after a re-ring job I noticed a six inch crack in my right side pipe close to the head.