[R-390] MB T connectors? Adapters?

[Chris Farley via R-390]

Has anybody ever physically seen, or better yet have a part number for Miniature Bayonette (MB) connector  T?  How about adapters from MB to BNC?  IDEALLY, I would like to find T connectors with one male MB, one female MB, and one BNC.  This probably never existed, so an all MB T would be great.  

Brainstorming a project and don't really want to change connectors on the modules if I can help it. 


Regards, 
Chris kc9ieq