A few have done it with good results. Not as many as have normal winch mounts though, which is probably why they didn't come up during your searching.
I'm doing it too, but don't have it set up yet, so no pics. Mine will be mounted to the crossmember of the engine, but I have to have my other engine stuff in there first (Explorer serp setup and new radiator) before I locate the winch.
I'm also going to be running it through an aftermarket bumper, so won't have the info on a stock one you need. But it's a great idea I think, for the casual winch user.
The more you use a winch though, the more you'll appreciate an up-front and out in the air mount location. Just easier to use and especially spool-in.
Hopefully someone will post up some of their pics though, or a link to other threads discussing it.
Paul