Where can you buy a Brussels Griffon in Maryland?

Your best bet is to find out when there are local dog shows scheduled. Plug this link into your browser - http://www.akc.org/events/search/index.cfm?action=refresh_index&active_tab_row=1&active_tab_col=2 - it will allow you to search for upcoming conformation (proper name for the sport of dog shows) events in your area. You'll be able to meet and talk with breeders after they've competed each day. It's loads of fun whether you attend as a spectator or as a handler.