Thanks Bruce for answering. Another responder says there may be a possibility of manufacturing one. You are right, the cylinder rod is longer than many. It also has a closed end. I am missing the spring loaded mounting screw also. I continue to search on line and in antique shops hoping I can get lucky. I do not know anyone who can make one, but another responder says he knows some talented people. I hope they get back to me. It gives me some hope. The Model 45 has been out of production for a long time. Bart 1353.