One of my 180s was to find a MC, make an appointment, and invite my W. She actually went with me, complaining all the way there, but has only missed two appointments since we started last July (both after big fights). I really did not expect W to go with me when I made the first appointment, but figured it was worth the investment.
Not that MC has changed anything for us , but W did say at our last MC session that she did feel better after the sessions.
Just thought I'd share how I got W to start MC, I know your sitch is different, but I finally realized that if I believed C would make a difference, and then better be doing more than just hoping W gets C.