Buy some colorful duct tape. You can make lots of great things with it. I like to make flowers and gift cards, but you can make really cool purses and wallets, too.
You can start your own hat shop online. Use one of the arts and crafts websites. Or, if you're like me, and you hate to spend lots of time on your computer, go to some local gift stores or coffee shops and ask them to sell some for you!