Is what you're talking about a Dpdt slide switch?
No, that was an illustration to describe the action of the switch. What I have used is a small switch with gold plated wires being bent by the switch. You used to be able to get them from electronics shops in the 60s to the 90 made for making keyboards. I might have one in my workshop, but I have not got access at the moment as I am away for a week.