I know platy and swordtails can xbreed, so i would imagine there are some out there. but i doubt they would keep the mickey mouse pattern as i believe the MM pattern is from platty xbreeding. like a dalmation and a sunburst or similar is how we got MM's.
i've thought about getting some female wag tail and MM and trying to breed MMwagtail sunbursts, but that's just way too much to say.