If you happen to be in Brooklyn you can swing by the Brooklyn Superhero Supply Co. and pick up all your Superhero bits and pieces:
http://www.superherosupplies.com/ The really cool thing is that it is actually a front for a project that encourages kids to get into creative writing:
http://www.826nyc.org/ You can see more pictures of the shop here:
http://www.826nyc.org/about/facts/ Helga