Bakery in MN that uses Marshmallow Fondant, preferably made on-site
i don't think anyone's trying to be rude, i think you just have everybody stumped! :)
i would have rec-ed cake eater bakery, but they have called off doing catering and weddings. they used to have some kind of smore cake w marshmallow topping, if i recall. . . but that's not helpful for you at this point.
hopefully someone will see that your post has been "bumped" and weigh in with a great suggestion. good luck with this one!