You could also try a good jugglingstore. You've got jugglinghats not the same but very similar For example I've got "The manipulator" made by Andersen & Berner. It also gives you the advantage that they are very well made heavier and more solid than normal heads. Great for headmanipulation. Look at
http://www.trickswithhats.org/ Also a nice site if you want to learn to manipulate hats.