Post Cards from Disney Character?

[shmoogrrrl]

Is there anywhere in The World that I can get a post card signed by a Disney Character (preferably Mickey, Minnie or a Princess) to send to someone back home? We are going in mid August, and we have friends who are going in early September. I'd LOVE to send their Daughter a post card from one of the characters.

I know that I could just pretend, but I am a pretty sloppy writer!