My wife and I are iPhone users and we are planning to buy second hand Jazz (circa 2003-2004). I want to have a place for us to hold the phone, to connect it to audio and to charge. I am a bit reluctant with cigarette lighter charge and FM Transmitter/Aux In Jack solution. I'd want a USB to iPhone solution.
I see two options:
1) Get new head unit. That means I need to fork out extra 150 bucks (checked on eBay) for double DIN fascia on top of the head unit. Ideal but EXPENSIVE.
2) Get adaptor to stock audio unit. I saw this solution in US eBay and UK eBay (120 bucks) but none in Oz eBay. Will they work? Anyone tried?

Appreciate your help....