I recently bought a Griffin 9501-TRIPCB iTrip for about $30. It's better than the radio, but I'd love to have an aux jack. I have a 2002 with original radio/6 CD changer. Do I have any other options, or do I have to get an aftermarket CD player to have an aux jack? I don't feel like I've wasted $30 since it's a charger, too.