Universal Vista Cruise Throttle Lock:
Gadget's web site has great instructions on installation of this.
Install was easy. Just follow Gadget's instructions.
I mounted it in this position rather than over the top of the switch housing after a tip from someone on the VRF. I find it easier to use this way. You just need to file off the two tits on the cross bar mount pad nearest the switch housing and cut the cross bar at the threaded end about 1/8" to make everything fit snug.