In fact i've tried to request the price from my UK dealer - looks like this carrier (universal one) is not available to buy (the same as iphone4 media cradle) yet
In fact - all of them are requires towbar, and in case you've got one - Thule is the best option (Euroclassic, Euroway, etc)
http://www.thule.com/en-GB/GB/Produc...eCarriers.aspx