I find a lot of MBCs just talking to people at work. There are an amazing number of Eagle Scouts out there whose kids have just grown up and left home. They're often ready to jump back in and give some time and support.
In fact as of last Thurdsday I have 15 and solid leads on at least 5 more. That will leave me with 12 more to recruit after that.
I've picked up a member of the Camping Committee, and 3 MBCs that same way but at the Joint Service Clubs monthly meeting. Working on someone about to retire from the news business to take on Journalism, Public Speaking, and be the District Publicity Chair. When you're part of the Key-3 you end up doing lots of things.
That reminds me, got to call the local cable tv provider on Monday to see if I can convince them as a tribute to Scout Week to Run Walt Disney's "Follow Me Boys" starring Fred MacMurry, on the weekend that starts it and the weekend that ends it. Say! Why don't you do the same in your area?