Tooljoe had one for sale recently. I'm sure I have a spare somewhere as well......
Mine is in good condition but impossible to open.. check eBay as they are a common knife. Also, rough rider makes a version too, if you want a new one. (search for electricians knife)
Mine is on its way to home now as we speak. I'm not sure if you are set on a Camilius only but there are other companies that made there own version of it way back then also..
I will keep an eye out for one.NateThat's us mobile