That link is good for lockout-tagout.
He may be asking for the breakerlock in regards to disconnecting means.
See if this is what you seek.
http://kscdirect.com/item/CH+CHPLGF...L+PADLOCK+DEVICE+FOR+1P+3%2F4+GFI+BREAKERS%0A
Those Powerblocs look pretty handy but looks like they have to be purchased direct from the manufacturer?
View attachment 3981
The circuit is the feed for a bandsaw that is hard-wired (as opposed to cord-and-plug connected) and I would like to be able to lock it out when working on it. Say no to stubs!