here's the one that i got....
http://www.autotoys.com/x/cust...pics1
i didn't buy it there but that's the model number and about what i paid. PAC something or rather. do some googling and you might be able to find it cheaper but not by much.
i believe this will work with all factory radios. you'll have to do a little research, though. i've had mine for a while now and i've forgotten a lot of the details.
it's not specific for iPods. you have to get a cable that goes from RCA to the headphone plug. it's not a fancy one that you can control your ipod with the steering wheel or using the radio. it's just an auxiliary adapter.