I just spent 30 minutes looking for a replacement switch identical to the one Marc shows and came up with nothing!
Speedway Motors and Painless Wiring show the most promise, but I finally gave up and went to dinner. Never thought it would be that hard to find a friggin switch. And I used a bunch just like that over the years, too. A toggle switch or rocker switch would be much easier to find.
@Marc Orloff everything I looked at for switches was rated for a measly 15 amps, which is almost exactly what two fog lights will draw. If you get a switch, try to find one rated for 20 - 30 amps OR get a fog light relay kit with a 30 amp relay rating so the relay and switch will last forever.