well there is limited choice, deffinatley NOT the Yamaha ones!

(which i have) but the expensive ones are the touratech (used in long way series)
http://shop.touratech.co.uk/zega-pro...er-system.html
but i found these which are a much more traditional system (in germany) and they look pretty good
http://www.off-the-road.de/XT-660-Z-...-Z-Tenere.html