Does anyone know where I can get a copy of the map CD's for the Crossfire's Infinity cd/Sat Nav unit?

I've just taken delivery of a new Crossfire (coupe) & it has the sat nav unit installed instead of the standard CD player - however the dealer hasn't got the map CD's for it so hasn't charged me any extra!

As I live in the UK I particularly want the UK and (if possible) Europe maps. Can anyone help??!

cheers

ps. the car is AWESOME!