where do you get one of these???

I ordered ours from the Kawasaki dealer. It was an aftermarket part, not sure of the brand. They are made by at least a couple of manufacturers. You have to re-route the crankcase vent hose out of the way to use it, and will have to turn the carb side ways or remove it to get the original screw out. You also re-use the original spring, washer, and "O" ring.