When I have been dissatisfied with Disney fabrics in the past (I generally find the fabric to be too loud, or the print too large), I have tried to create items 'inspired by' Disney using non-Disney fabrics.
I used black calico fabrics and red/white polka dot fabric to make this Minnie Mouse "inspired" purse for a friend! I cut a mouse-head shape out of the red fabric and used iron-on adhesive to create my own applique. You could definitely do something similar with an apron! That would allow you to choose more apron-friendly fabrics if necessary.
Also, check the ribbon section - I have found cute Disney ribbon in the past, which could be used to accent an apron made from non-Disney fabrics.
You could also use buttons to make Mickey head shapes! So many possibilities!