Unlikely. They don't even have a car kit for iPhone 4/4S available in the US. Not sure why they have it on sale only in the UK but the price is pretty steep.
Checked it out today: the lightning to 30 pins adapter works on the 3G/4 model of the tom tom car kit. Again an extra piece of velcro is your friend to enable the switch. Next step is to modify (lengthen) the holder to hold the iPhone 5. A nice fitting shell for the adapter matching the tom tom carkit style/color would be nice as well. Charging, audio and tom tom function works.
(video output is not supported through the adapter (per spec)).
Charging, audio and tom tom function works.