Found 'em. They are made by Panduit.
They can be found at www.panduit.com
The breaker lockout is model PSL-CB, light switch is PSL-WS, and the Cord lockout is PSL-P.
I have the contractor kit but also got the valve lockout as well. Don't ask me how much since they were a gift

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I have used the switch lockout on small breakers since the trip handles can be small on the house panel. You can only tighten the screw enough to get the lock to stay on. Too tight and they break the switch. They have a better model of the cord lockout which will cover any male end to keep people from using a tool that needs repair. Someday, I'll get that one. Can you believe they have lockouts for network jacks? I guess, after looking the site over again, you could find a lockout for anything....(thinking)....except someones mouth.