No such beast exists.
IR distribution is usually handled via devices like the GC-100 from Global Cache or through IR networks like those sold by Xantech. Other options exist but none work without having some sort of additional wiring or coax add-on devices installed.
As in, nothing will push IR over powerline to in-room emitters. At least none I've ever seen. If they existed, at a reasonable price, I'd certainly be interested in making use of them.
-Bill Kearney