Um no... please buy it...
Do you have any dealer in Europe? Because the cost of the throttle tube + shipping + customs and tax is aprox 200$, and that is way way over the limit i'm prepared to pay for a tube.
For example, a plastic HRC throttle tube+ HRC throttle housing cost me 60€ last year at honda importer in SI.
Besides, I really like to make as much things I can at home, one is the fun of doing it, and the other that my budget just isn't enough for my racing, if I have to buy everthying. On a 600RR I have a home made a fast throtle, frame sliders, fork sliders, swingarm sliders, raised clipons, ais block-offs, rearsets, pegs, Bazzaz TC light,.... I was really hoping, I'd be able to do the same with my R6.