Hi Tamra,
If you are looking for an alternative
Character Dining location where you are still likely to find Mickey Mouse, here are my recommendations:-
1/ 'Ohana at Disney's Polynesian Resort
2/ Cape May Cafe at Disney's Beach Club Resort
3/ Tusker House Restaurant at Disney's Animal Kingdom
4/ The Garden Grill Restaurant at Epcot
Best Friends Breakfast with Lilo, Stitch, Mickey Mouse and Pluto at
'Ohana is our absolute favourite place to enjoy breakfast at Walt Disney World.
I hope that these suggestions have been of help and please do be aware that Characters are always subject to change without notice.
Wishing you a magical trip filled with memories which will last a lifetime!