I don't know if this exists or if I'm saying this correctly, but I have the FM direct adapter installed in my car for my SL2, and I am looking for a FM transmitter that will plug into that so that I can plug in other devices and have them go over FM without any interference. Does anything like this exist? I figured their has to be something, but I'm not sure. If this is kinda confusing let me know and I will try and explain it better. Thanks in advance.