Yes, the big toy store at dtd (I think it's name is World of Toys?? but not sure) has a huge section to build your own disney potato heads. Here is a tip I learned from another thread and sounds like a great idea:
Apparantly they charge one price to buy the case and fill it with all the mr. potato head supplies you need. So since the bulkiest part is the body, the post suggested that you buy a generic potato head at the store, then at dtd fill up your case with all of the disney accessories for the body ie: ears, arms, hats. The potato head body is the same as every other body, it is the special parts that you can only get a disney that make it unique.
Have fun!