Question Before buying Creative ZEN Vision:M

I am looking into getting my dad an mp3 player for a gift. After doing some research I found out that the Creative ZEN Vision:M 30 GB mp3 looked pretty good and found it for a really good price one newegg.com. But to the question, I couldn’t seem to find some sorta adapter that allowed the Creative ZEN Vision:M player to be played through the cars audio system, which is important b/c my dad does lots of traveling. I was wonder if its available and where could I buy one? If not what’s another good mp3 player.

Any links or suggestion would be much appreciated!!

Thanks