I think Cabelas has the "Thumb Assist Pro".

Bought one for my wife, and I even steal it and put it on my quad. That works great for us, completely goes away and can ride forever with no problems. Love it.

Good Luck

 

We went with the Cabela's thumb extension thingie and it works great on both our quads. I pretty much use the palm of my hand now, instead of the thumb. My only complaint now is, if I hit some unexpected big bump, my hand will fly off the bar more easily (not caught by the thumb) and I almost fall over the bars. Guess I should slow down - [img]i/expressions/face-icon-small-wink.gif[/img]