Apple
4-in-1 Car Kit
4-in-1 FM Transmitter & Charger Car Kit for Apple iPod. You can connect your iPod to your car stereo wirelessly and listen to your iPod through car stereo.
Yesbuy.net

Generic
iPod FM Transmitter
iPod FM Stereo Wireless Transmitter for your car. Easily use your iPod to listen to your favorite tuens through your car or any FM Radio.
Microbarn.com