Sex reassignment surgery
Sex reassignment surgery to create a vagina consists of using segments from the large intestine or small intestine. In addition, penile-scrotal skin flaps are also used. Nongenital full-thickness graft (FTG) or split-thickness skin grafts from other parts of the body have been used. Inversion of the penile skin is the method most often selected by surgeons performing gender reassignment surgery. The inverted penile skin uses inferior pedicle skin or abdominal skin for the lining of the created vagina. The skin is cut to form an appropriate-sized flap. The skin flap is sometimes combined with a scrotal or urethral flap. Sex reassignment therapy is often part of the treatment plan.
Wikipedia
Pretty much what the villain in “Silence of the Lambs” had in mind, except he did his own sewing.