Dan, PM me with your mail address and I'll drop the bright yellow CAT silicon O-ring in an envelope to ya.
I don't remember the part number and I didn't pay for it - when I went into the local CAT house to buy it, the guy at the counter pointed to his helmet on the shelf behind and refused payment for the 'cruise control'.
While it works to hold the grip, and you can overcome the friction to roll off the throttle, I cannot move it back to the bar-end to completely 'dis-engage' it without coming to a complete stop and using two hands.
It easily rolls into the gap between the bar-end and the grip, but is too tight to roll-it back out while moving.
Maybe others know a trick but for me it was not an acceptable solution.
nosaint ... that looks slick and is worth the $20 to try IMHO for the ocassional cruise wrist relief ... either lift it with the finger or clutch-in and roll the throttle forward to instantly and completely disengage while on the go ... hopefully it doesn't interfere with my finger that constantly covers the brake ... THANKS for that link!!