You can get a facia adapter from halfords, motorworld.
You don't need an iso convertor caple as the standard cable is iso.
But there was mention on a thread earlier of a better facia adapter, sorry can't remember who had it.
To get the OE radio out all you need to do is use two thin pieces of metal eg. a knife and slide them in each side of the radio about where the vol and af lable is, lift them up a bit and the radi will come out, if you can't be arsed to do this fiat will remove it for you with the right tool, they didn't charge me.
