Well I hope I can help,
A few years ago I got my MCC by calling LFV in Sweden (where I have a CPL from) and asking them. They told me to get a letter from my chief pilot (where I worked in the states)verifying that 1) I was currently flying a multi-pilot aircraft (at the time a SAAB 340), 2) had more than 500 hours in that configuration, and also making acopy of my logbook confirming that as well. a bunch of money (but less than had I taken the course) later I had my MCC.
I also did the same thing for a CPL licence renewal and co-pilot SAAB 340 type-rating after my initial type checkride.
Good Luck,
Catans