Pete-NZ made his own and is selling them also, in the "Minimalist Touring (250cc and under)" thread
He mentions making it in this other thread http://www.advrider.com/forums/showthread.php?t=790146
Originally Posted by MiteyF
I was hoping for a US supplier... not really looking to drop the dough for overseas shipping.
DRT, any chance you'd like to take some detailed close up pictures for me? I may have to grab some stock from work, and bust out the beer/tools