Back in August when I was looking for MCs I never found one. Unfortunately, as common as relationship problems are, we are as a culture completely unwilling to discuss that fact publicly.
The best I found was to do searches for Marriage Counselor <My Town>. My wife and I put together a spreadsheet with their names, distance from our house (we live in the country, so distance is an issue), their hours, and any thoughts we had, then narrowed it down to our top three. Even if you're only going by yourself, that method should work.