If they were rack pins they will be back shortly.
I saw one poor woman with a Stitch pin on her shirt and believe me you don't want to wear those around WDW. The poor woman was not a pin trader, she just bought the pin because her kids liked the movie. People were asking her for that pin right and left. She didn't know about trading and didn't understand why everyone wanted a pin she paid $6.50 for and were all over the racks when she bought it.
Way back when Monsters Inc. was released you couldn't find MIke or Scully anywhere on property but now they are all over the place.
Just wait it out a little and you will find Stitch too. Peggie