There's a small store in Columbia Mall called I Love Theatre which carries Beatles t-shirts, mugs, little album cover magnets, and an assortment of other items. (They also sell lots of non-Beatles related stuff.) The owner, by the way, is a Beatles collector himself and happens to be a very nice guy.
From a printed profile of their store, "We are delighted to learn of your interest in our store, I LOVE THEATER. As the largest theatrical/entertainment gift store in the Maryland/DC/Virginia area, we offer every type of specialty item imaginable. [...] We feature an extensive selection of gift items for theatre, dance, music, television and movies!"
I Love Theatre
8147 Main Street
Ellicott City, Maryland 21043(410) 461-4230
Owners: Cookie and Michael Kornstein