I want to play my iphone's content via my toyota 4runner but I need a cassette adaptor. I have been looking online but a lot of them say they are for ipods. Can anybody recommend a good cassette adaptor that works with my iphone? I am not at all sure which one to buy and I don't want to get stuck with one that works for earlier ipods but not for my iphone. A link on where to buy it would be great too. Thanks so much if you can help me out.