Those poor fellows at /d/. A few months back I essentially posted an entire bimbo thread for them. They've been trying to have lightning strike twice ever since. That has been the same sad OP's image for a bimbo thread countless times, each thread having the same exact content as the previous one. They don't seem to understand that that kind of artwork is scarce.
So yes it was posted previously, the artist is here.
http://surakuraanon.deviantart.com/