I'm looking for one also but I'll let these guys have a chance to snag yours, schiesz.
I may be mistaken but I think the McR27 is closely related to the original, focusable PM6. The newer non-focusing model uses a longer reflector. I was cave-man grinding down an old PM6 reflector, the smallest cylinder popped off and the result looks much like a McR27. So these may be getting rare quickly. This is just a guess.