I think it was about $25 Shame you had not looked at this a coupe of weeks earlier could have put a lead for you in my shipment! I went for a source selector too. which lets you keep the CD changer as well, with that the lead and Shipping was £85

You can go a couple of ways here

1 If you have not bought your ice link yet get Halfords to fit it they will have to change the wires for you then. It does tell you which one to change in the instructions.

2 Order the lead or a complete Ice link from Tom