I have a 1925 Lincoln L Limousine with a 1930 V8 which appears virtually identical to the original 1925 V8. My distributor rotor, which has two distribution contacts (left and right bank) appears wonky and needs replacement. One contact arm is bushed and rides smoothly on the spring, the other side is unbushed, wobbly, and clearly marginal. Where could I possibly get a replacement rotor. I need a source recommendation. We have spent hours trying to troubleshoot an engine that runs on the right bank only and smoothly. All cylinders have good compression, fuel is good, all plugs are good and spark, distributor wires follow the cap numbers in the right firing order. We do not have any vacuum leak of any magnitude. Given we have compression, fuel, and spark, I am out of ideas other than the rotor on the one bank is marginal. The coils (both) are good. PLEASE HELP.