For my iPod mini/Video I got a great car charger with an FM adapter, plugs into the dock connector and just works. I want to say it was from NewerTech. However, it doesn't work with my iPad (or iPod Touch 4). I've looked around and I see some chargers that claim to work with iPad, or separate FM Transmitters, that are more generic and hook up thru the headphones jack. Are there any combo charger/transmitters that work (preferably) thru the dock?