I bought my car and it came with a non stock radio already set in. I want to be able to play my music from my ipod but the radio doesn't have that option. I don't really know anything about these kind of things and was wondering if i could buy any kind of radio with an aux, or does it have to be a certain size? I'm not looking for anything real special just one with and aux input. Cars a chevy s10 2001.