There are wedding pins with Mickey and Minnie in wedding attire. You can buy them on ebay or at any pin store. I think there are a few designs.
I am making bride and groom hats for our 25th wedding anniversary out of ball caps. My husband won't wear the top hat, it's not very comfortable. I purchased regular mouse ears, and white and black comfort fit ballcaps off of ebay. I am having the hats embroidered with "Just Married, 25 years ago" and then putting the mouse ears on them, with a little tulle on mine. They'll be much more comfortable than what you can buy. I think they'll be cute. I doubt we wear them all the time, but it's fun making them.
Congratulations, and good luck finding what you need.