[brucepick]

Mine is an on-off toggle on left side of dash, low down. It was in the car when I bought it, had been installed to control some lame fog lights which I've since removed. I've seen these switches in parts stores, and probably also at Radio Shack. It had an internal light once but the bulb died.

I like the toggle. Flip it off to kill. I don't have to keep my finger on it. Flip it back on again after engine is stopped. That way it will restart whenever I bump it or key start it. It has a long toggle handle so it's easy to swat with a finger or two whenever I want.