Red Button SPST Pushbutton Switch : Pushbutton Switches | RadioShack.com
I'm not sure if that's the exact swtich, but that's exactly what it looked like. The car it was in got totaled. Check the tutorials to make sure it's the right amperage.
I put it in a blank button space next to the headlight button I think. I just drilled a hole that was as snug as possible for the button. Worked great. Or maybe I put it next to the hazard button...
P. S. The two poles on the other side were pretty close together so I had to solder the wires to each pole and the wrap it in electrical tape.