I have no idea:-P.

concerning the MPC - buy a C* S-80 Play it until you want something else. You can go off people's suggestion, but measure the suggestion to weather you want to sound like that player. If you do, then get his setup. It's not going to turn junk into gold, but it's a start. The C* might be more then you want to play for a MPC (80+ used) but it's worth every penny. Unless you break it (like chip the facing) it should last forever. Even if you don't like it you won't loose that much if you go to sell it. If your playing on what came with yoru vito, I doubt you will be upset with the purchace. Playing on your first professional mouthpiece is definatly an experience you will never forget. concerning the Neck - Does it really matter? I guess you could make sure the finish matches, but with my 1949 Conn, the neck has no laquer left on it, so that might throw you. Maybe a better suggestion would be to look up vintage photo of the horn in question and compare. If it's a tenor, it has a higher chance of being not the orginial, they tend to get damaged beyond replair more often. Overall, to most players it doesn't matter unless the nech isn't even the same model. Then you might have problems selling it to a experienced player. I guess everyone 's wondering, why your askin?