Check hers out - she does have a cute Cinderella one. I bought my New England Patriots one through her and I couldn't be more pleased with quality and service.
You could also just buy a plain one and add some Disney charms to it. They sell a lot in many of the gift shops. When my two friends that I met while working down there got married, I bought a Mickey head shaped charm and had it engraved with their Disney nickname. It made a really cute little gift. I had one of these on mine too.
I have a lady who custom makes them for any themed wedding.
I ordered one for a friend and was very happy with it. My friend had a tough time finding one in the look she wanted and in a size a little larger than the norm.
If you want PM me your email and I'll send you all her info.
She is in NJ but she will talk to you directly and mail it to you