In general, servos and ESCs work equally well with 72 mHz and 2.4 gHz.
You can pull the receiver out of a BNF. Or, take a look at
Horizon PNP (plug and play) models
http://searchrc.horizonhobby.com/ind...d=1293C4E46976
Tower RXR (receiver ready) models
http://www3.towerhobbies.com/cgi-bin...rx-r%3C%2FB%3E