www.turnswitch.com is the one I use.
I have the switch hidden under the dash at the door pillar. You cant see it unless you look under the dash. Cowl lamps are the front lights and the rears use the brake light. You can adjust how long to leave them on for, or automatic self canceling. As long as your foot is on the brake pedal, the time wont start, then I have it set to turn off after 15 seconds.