Ok boys n girls...found it:
http://www.wholehousefmtransmitter.com/Now it is a little on the spendy side (100$ with a multitude of cool accessory's) but im sure you could find one on e-bay
EDIT: 70 bucks on ebay, and I found another company that makes 5w xmiters as well.
I could see this being cool in my little hometown of 8500 people and 17 miles of road end to end.....just fire that thing up on a open band and play a good playlist
= james pirate radio.....until the FCC shows up. But it would be in a
tiny town in southeast alaska....so maybe no FCC involvement ever!! I could only imagine all the happy people with a new alternative to 3 boring jerk stations all the time