Norvil Q.A. Twistgrip

Hi All, I'm after a quick action t/grip for my Norvil(fed up having to take 2 handfulls) any ideas on where & who's cheapest?

Thanks in advance, Hayabusaman.

I've used a couple of options for my racer.
It currently has a Tommaselli Daytona twin pull throttle. It's quite QA but not the quickest.
I have also used a Yamaha TZ twin pull which is quicker but expensive.

The cheapest way is probably to use a single pull motocross throttle with a cable splitter, but if you do this remember that most cable splitters will only deliver about 36mm of cable action so if you've got , say, 34mm carbs, you have to have very little free play in the cable if you want to get full throttle.