Play iPod through radio?

I have an old iTrip I use in my corolla to play my iPod. The tape deck in the car is broken and it has no aux port so through the radio is only option I have. Only one problem, I live in the city of Pittsburgh and can't find an empty radio station to play it through.

Anyone know of a good one or a good newer iTrip like device? Mine is at least 3 years old now, probably a lot more.