Perhaps he is going for the wrong transplant.

Consider that, according to medical research, the average vagina can accomodate, without discomfort, about 4 cm more of penis than it normally receives. With about 4 million women in New York alone, that means that there are about 16 million centimetres of unused vagina in New York. That means 160 kilometres of unused vagina.

Perhaps a sex change is needed, rather than a transplant.