There is no such thing as a "reputable" breeder of a designer/mixed breed. Those people are just breeding mutts - there is no standard, preservation, or purpose involved. Why not conisder a purebred bichon frise, miniature poodle, or toy poodle? Each breed has a parent club that can be contacted to find a reputable breeder.
EDIT: or you could just adopt/rescue a poodle mix if you are uninterested in a purebred dog.