My suggestion is if you are planning on decorating the room in a Mickey theme, you may want to get somewhat solid colors for the bedding and/or make something yourself. There are some online (as posted before) however we had a problem trying to get things to match when we tried to put the room together. We did not do a Disney theme (mainly because we don't want everyone to think that we are going to push Disney on our Daughter. But come on, she has to love it, right??) but we found a bed set that we really liked the colors in and purchased online. When we got it we fell in 100% love with it. We painted the room to match and then decided to put some stuff up on the wall and find some accessories that would match; light switch cover, crib mobile, lamps, etc. We found that it is hard to find things for a bed set that is not available in stores. We finally gave up on it and went with a whole different design that were the same colors. It looks great and we are still waiting for our daughter to see the room, September 15th is when she comes!!
I guess the biggest thing I suggest is look around before picking what you want for sure. You don't need the stress of searching to find a matching coordinate.
Good Luck and Congrats!!