Just go buy a standard 'ol switch from your local auto store... your choice, and just follow the directions, one wire for ground, one wire to the battery or other power source(solenoid), and another power wire runs to the neons. If you're doing multiple neons you're gonna need some kind of wiring harness or something so that you can run one pair of wires from the switch to the harness, and then split that one pair into all the pairs you need for the multiple neons. It's a lot easier than it sounds, and if you tell the guy at the parts store what you're doing he'll get you all the stuff you need, and it shouldn't cost anymore than around $10 or so.
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Cruising a Z24 right now, But I've got plans....
http://www.lingenfelter.com/lpe%20-%208%20sec%20Vette.mov