if i could somehow get my hands on one, i could make a cnc program for it, with some difference for obvious legal reasons
the parts involved would be significantly cheaper than $600 usd, and the program would be compatible with most 3+ axis cnc machines. i already have a pv cover drawn up, but i need to take measurements from the rest of the parts, and actually see how it interacts with the valve.
ive read that ktm offers one for their bikes, a gg peice could probably be engineered from one of those, assuming the pv is similar...
but along what swazi was saying, wouldnt it be a pain in the ass to change while riding, would a handle mounted choke adjuster be enough to move the knob perhaps?
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Le Crutan 
98 ec250 sixdays, doma, eline pipe guard, zokes shivers from a cr250,fredette racing chain slider, protaper withbarkbusters (SOLD)
FOR THE SECOND TIME
07 EC300 polisport headlight, acerbis taillight ltr pv cover and case saver,trailtech endurance,120z fww, g2 throttle,xr chain puck: