Just to see if people are interested in this I set up a site where one can buy Genuine Robot Chicken Hats for the game Team Fortress 2 (on Steam).
http://itsmods.com/adultswim/The site should be self-explanatory, but if you have questions, feel free to ask me more!
Also if this gets popular I might add many, many, many more items (I have a few 1000-slot backpacks filled with all kinds of random stuff).