Welcome to planDisney Sophie!
Shopping in
EPCOT is always an adventure! You just never know what you will find as you wander through the stores in World Showcase.
The
Mitsukoshi Department Store in the Japan pavilion is amazing! I could browse all day in this store. Since a phone call did not work in trying to get your item, perhaps
try sending an email to Walt Disney World. Under "Subject" choose "Merchandise." Under "Your Question" be very specific with what you are looking for.
I am not sure this will work and email responses are taking longer than usual, but hopefully you will receive a positive response.
While not ideal, reach out to friends and family to see if anyone is heading down to Walt Disney World anytime soon. You just never know if a pal can pick up the postcards you are looking for. If nothing seems to work, see if you can track down the item online. Sometimes you can find just what you need with a few clicks on your computer!
If all else fails, perhaps a return trip to visit Mickey Mouse and his friends won't be too far away and you can pop into Mitsukoshi yourself! Good luck finding what you are looking for.
Cathy