Alternative Apparel is a supplier of clothing to stores like Urban Outfitters.
I actually discovered Alternative Apparel through my friend's store, Presence, in Chicago--a really classy, hip women's boutique in Andersonville that doesn't charge an arm and a leg. (I found a men's sized Dia de Los Muertos-themed belt there for $15!)
Alternative does most of its sales wholesale to other stores, but you can find great consumer sales through them as well. Instead of paying $30 for a shirt or a hat at UO, you can get it for half price direct.
click images below for alternative apparel pages