When Disney does wedding cake re-creations, it's usually a 6-inch cake covered in fondant. While they may be able to cover a 1-tier mini cake in fondant for you in order to replicate the design of your cake, if you asked for a 2-tier mini cake, they won't use fondant. The only pastry team that seems to be willing to cover 2-tier mini cakes in fondant is the Contemporary's, and even then they will warn you that the small surface area makes it difficult to accurately replicate most designs.