From a friend at CLUE:
The non-profit I work for, Clergy and Laity United for Economic Justice (www.cluela.org) is printing T-Shirts, are we are trying to come up with a more representative symbol for Islam, rather than the historically inaccurate crescent and star. Controversy over symbols aside, does anyone have any suggestions/ideas??Please send them to me in a quick email.
Suggestion in comments.