Russell
I have both mirrors that I don't think have ever been moved. The door has been repainted once, but I'm sure the mirrors were either factory or dealer fitted. I have recently replaced the opaque plastic gaskets, but other than that I think they are stock.
The DRIVERS side is 62mm from the leading (front) edge of the door to the start of the chrome base, and the PASSENGERS side is 72mm. That is the chrome not the rubber gasket.
Hope that helps and would be happy to hear if it differs from any others out there.
Richard