Whoops. Forgot to add that since IDEAL is a hatchery, you will most likely not get standard-abiding birds. IDEAL bantams are too heavy, I hear, so you would have to do some selective breeding and breed the smallest ones together. Not sure about body-type or colors. I assume those would need work, too.
Meyer Hatchery near Polk, Ohio sells d'Uccles. They have a steeper price for their chicks with or without Marek's Vaccinations but they offer a five-bantam-chick minimum. Really nice customer service who will help you in any way they can.