I found it at a NYC wine company - Acker Merrall a few years ago. You may want to contact them and see if it is still available and if they can ship to your state. It was very hard to find.
http://www.ackerwines.com/
Thanks. I might check with them. But (sigh) I do live in Georgia -- our marvelous stage legislature is only recently loosening up a little bit on consumers being able to have wine shipped into the state. I'll have to find out whether I can legally have a liqueur shipped to me.
I did find someone in West Palm Beach, FL. I might just have to drive over there next time we go to WDW!