Well the UK just the rear LED lamps are
Left - led tail light, rear fog light (left hand traffic only) - 5K0 945 093 AD.
Right - led tail light, rear fog light (left hand traffic only) - 5K0 945 093 S - they are £115.26 inc VAT each, as fitted from 7th June 2010.
It appears the US market don't have fog laps
Left - led tail light, rear fog light (right hand traffic only) - 5K0 945 093 Q.
Right - led tail light, rear fog light (right hand traffic only) - 5K0 945 093 P and they are the same price even without the rear fogs.
There is probably some electronic regulator/control unit for these. Plus you're going to need VAG-COM to set it up.