Hey guys, I've got a friend who wants to play music from his iphone through his car stereo. It's an old car, I think it just has a basic factory CD player, and I don't know if it has an aux button or a minijack socket. Is there such a thing as a CD shaped adapter that can slot into his CD player with a minijack cable trailing from it that would connect to the phones headphone socket, like those cassette adapters?