We are getting our 2007 Kluger converted to LPG. The newer systems fit into the spare wheel space, so we do not lose the versatility of the 7 seats, and one is given an emergency gooey kit for punctures. Does anyone have or know of a clever solution for retaining the spare wheel, like a carrier that won't take up too much boot space? Ford Territory users have some nifty things that can go on the roof rails - any ideas from Toyota people?