Just thought I'd mention that, for those of you who might still be looking for Hypertrophy Genitals Girl, the guys at Futanari Palace have links to it now.
You can find them here.
Anyway, what I actually intended to post here is a sort of pseudo-futanari based off of One Piece, so I hope it still qualifies. Anyway, the premise is that Nico Robin, the black-haired one, has the ability to project duplicates of her body parts on any surface near her, so as near as I can tell, the 'dick' formed of several copies of her clit. So... yeah. Enjoy.
http://g.e-hentai.org/g/89365/977637f231/