I was posting a reply on another forum and thought I would post the info here since it can very useful for those that use MV lens.

Here is a great link to copy and keep. http://www.hubhobbyshop.com/hint32.htm

Scroll down and there is a chart that list bit size, bit #, lens size and MV part #.  I cut n paste the scale appropriate sizes and keep it on the bench.  MV lens can be hard to find so don't limit yourself to RR sources.

Steve