Did you browse the shapes in the adult mirror site? I guess most creators of bodyshapes don't want to create barbies and eunuchs, so the natural place for bodyshapes are the adult sites.
Also, I think another subutilized Sims resource is the Sims Wiki. For example, the "Body Shape" article
here is still in the deplorable stub version I wrote more than an year ago.
Personally, I think it's a kind of psychopathy to think that the nude human body is obscene and must be mutilated and censored - specially in a game where the sims have the sexual morality of Caligula.