My kids are big fans too, so we looked when we were there in October. The only thing we found were some figurines in Japan. Hugely overpriced in my mind. If I remember correctly, they were upwards of $30.
I did hear that the Virgin store in DTD might have something, but I'm guessing it's just the figurines since that's all we've ever seen anywhere.
A keyblade would be a really cool find!