Welcome aboard, Melissa! I just adore the beautiful Disney Pandora charms that are available for purchase both onboard and in the Disney Parks!
The brand new Disney Cruise Line Pandora charm is for sale exclusively onboard the ships, so I hope you'll find one when you set sail on the Fantasy next spring. It is an beautiful silver mini Disney ship with the DCL logo. Because merchandise is subject to availability, I can't guarantee they'll have them in stock when you sail, but your best bet is to go to White Caps on Deck Three Forward that first night for the best availability. The shops usually open around 5:45 p.m. on embarkation night. I believe the charm is about $45.
Disneystore.com offers some Disney themed Pandora charms as well, but they tend to sell out quickly. While they will not have the Disney Cruise Line charm, since it is exclusive to the ships, and there are other parks-exclusive Disney Pandora charms, online they will carry some other Disney charms, so you may put your name on the email list to be notified or check back when you can if they are not currently available online.
Alex and Ani offers a
Disney Cruise Line bangle bracelet as well, which is for sale both on the ships and on Disneystore.com. They, too, are very popular and sell out quickly!
It sure seems like everyone wants to commemorate their Disney Cruise Line vacation with a special charm! I hope you're able to find the perfect one for your trip as well, Melissa! Happy planning and enjoy your magical sailing on the Fantasy!