Hi Buster,
I recently obtained a MC16 here in Oz, it was in rough shape. I've been able to get parts from David Silver Spares in the UK. Getting enginee parts is a pain and I'll be looking to use MC18/21 parts where I can. Fairings btw are almost impossible to find or to get shipped cost effective. I had to do quite a bit of plastic welding to get mine back into shape.
tire choices for the 16 are also limited.
cheers,