Originally Posted by Donkey Hotey
It would be pretty pricey. The Acerbis tank alone, sells for about $100. The headlight (without the shell) is $40 for a Chinese one and $100 for a Hella. It wouldn't be an inexpensive solution.
I've heard rumors that a Katoom aux tank ala the Dakar bikes would mount on the subframe opposite the exhaust.
edited to add: quick search turned up this tank