Hi Mac, yes I have an original mic that I am in the process of restoring, so I disassembled it. I carefully measured, with micrometers and vernier calipers, the component parts and I made a computer model of it. The model is dead on.
I am yet to reverse engineer the bakelite switch parts.
My email address is: L4DOTflyerATgmailDOTcom (just substitute the "AT" and "DOT").
Here's a couple of pictures of the model:
Again, another group has made a superb reproduction. I have no idea what their final cost would be.
I intend to create press tools from my model to reproduce the front face from aluminium sheet, like the originals. I hasten to add that this project is a while in the future.