This store was magnificent! In addition to all the supplies you could possibly want, it has a capery, where you can test the wind-worthiness of your cape, and some kind of villain-tester. Plus, in order to buy anything, you have to adopt an identity and swear a superhero oath in front of everyone in the store. I bought a jug of Invisibility and a can of Antidote. The humor was lost on the airport security people that evening, though.
By the way, if you look closely, you can see two kavanagh heads in the lower left of the storefront photo.