Has anyone bought a PhatBox from America for the new mark V Golfs?

Since the PhatBoxs which are designed for the VW Golf in the US are for the old model I am worried that if I buy it for my new Mark V Golf there will be compatibility problems.

I have found one in www.vwparts.biz for $359 which even after delivery,duty, and VAT will be cheaper than 600+ the dealers here are charging.