Full size T-bars and mounts probably won't be much use for CMC2s.
I use a piece of scrap plastic (or a ruler will do), drilled in the centre, and secured with an adaptor nut:
Edit: since taking that photo, I have modified my technique to DIN, (17cm apart, 90°). I can also fit a pair of AT933s on the same T-bar.
I also use velcro cable ties to secure the cables.
There's another photo in the "rigs" section of someone using a wooden ruler.
Sound Professionals also have a T-bar for mini-mics, but the method above works fine and is almost free..