Hi Tracey! Thanks so much for your kind words about the Moms Panel! Your question came at a great time, as a post on Key Lime Pie just appeared on the
Disney Parks Blog! Mini Key Lime Pies are currently being sold at Goofy's Candy Kitchen at Downtown Disney, Sweet Spells and Candy Cauldron at Hollywood Studios, and the Main Street Confectionery at the Magic Kingdom.
While it may not meet your husband's definition of "real Key Lime Pie," the Key Lime Tart at Olivia's Cafe in the Old Key West resort is a favorite for many guests, and this spot is considered the best place for the tangy dessert. The Key Lime Tart at Sunshine Seasons in Epcot receives rave reviews as well. You'll also find a Key Lime Pie or Tart on the menus at the Grand Floridian Cafe, the Captain's Grille, Fulton's Crab House, the Cape May Cafe, and one of my personal favorites, the Wolfgang Puck Cafe. Your husband will have plenty of options to get his Key Lime Pie fix!
Hope this helps! Come visit us again at the Moms Panel if you have more questions!