[ambrop7]

Here, I just made one: http://www.thingiverse.com/thing:193022

Yes, it rotates and passes shafts successfully :)

Based on this model[1] with some modifications for printability. I've printed it in 6 parts and glued it together. It's barely holding though, because apparently super glue is not the best way to bond ABS ;)

EDIT: I just figured out that to use it as a shaft passer inside a wheel just like on the Wikipedia article, the rotor would need some plastic removed so that the shaft can get through without having to move up and down.

[1] http://www.thingiverse.com/thing:126794