The Vampiress of Versailles costume comes with elegant black and burgundy brocade gown, petticoat and collar. Accessorize it with your own jewelry, fangs, makeup and black shoes. Also available on Amazon.
Her companion, the Vampire of Versailles, wears a coat, vest, hat, and boot covers. (You'd want to ditch the boot covers and wear your own goth boots instead). The cane is a nice touch, but isn't included. The costume is also available on eBay.