Stan, I looked around for a switch like that, and I'll be darned if I can find anything like it. It's a slick idea, too bad it's not obvious how to find it again!
A power LED with a big resistor might make sense, make it only draw a mil or two, you don't have to have them smokin' hot to indicate power.
How about the S-812C50AY-B2-U regulator, 500na quiescent power. Only 16V input voltage, but it sure doesn't waste power. 99 cents at Digikey.