All the older AT supplies have switches. Thrift stores tend to have
what people clean out of their closets, so not so many ATX supplies--
yet. ;-)
Another good way to go is to remove the supply from an old computer
that is headed for recycling (you know, the two you have in your
garage that you will never power up again ;-).
-michael
NadaPong: Network game demo for Apple II computers!
Home page: http://members.aol.com/MJMahon/
"The wastebasket is our most important design
tool--and it's seriously underused."