Hi Ronald!
I understand your son's heartbreak and your urgency! We had a similar situation a few months ago where we launched an exhaustive search to replace a beloved stuffed animal purchased at Walt Disney World, as well. I'm going to give you a couple of options and hope that they help you in your search:
First, you can see if it is sold at
disneystore.com in their Disney Parks Products area. They do carry some Disney Parks merchandise, but it's not a complete selection, by any means.
Your second option would be to reach out to the friendly folks at Walt Disney World Merchandise Guest Services. You can either call them at 1-877-560-6477, or email them at Merchandise.Guest.Services@DisneyParks.com. The more specific you can be about the item, the better! If you can remember where you purchased it, that would be a big help as well!
I'm wishing you the best of luck in your quest, thank you so much for stopping by!
Amanda