I found the most awesome place, prolly in the city if not the world.

Welcome To Twin Cities Magic & Costume Co.

The website sucks. You have to go in there. It's like 3 storefronts (open all year long) of costumes, props, effects, you name it, they have it. The prices aren't really that bad either.

My partner and I were checking it out yesterday. We couldn't get in cuz they were closed but just looking through the windows... WOW.