Check out this store in New York. The Brooklyn Superhero Supply store in Park Slope, Brooklyn is a place where you can buy all sorts of superhero supplies. Tools of the trade like grappling hooks, bottles of chaos and gravity, capes, invisibility paint, jars of anti-matter, secret identity kits, deflector bracelets and so much more.
The staff treats the products as real superhero supplies and the customers as real superheros. They even try to get you to quote a superhero oath at checkout.