Jumper cable accessories

Hey just wondering if you car experts have any knowledge of this. When I was a lot younger in my teens I bought a set of copper jumper cable adapters for jumping batteries with side post terminals. They were about 4 inches long. They had hollow copper tubing for the main part of the body and then flattened out into a fork or 2 prongs. You put the tube part down into the jumper cable connectors and then slide the fork part down onto the side terminal nipple. It made jumping a side post battery very easy and you always had a good connection. Anyway. Anyone know where you can get them or who makes them. I found some at truck/tow. Com but they look pretty cheesy. The ones i\I had were really sturdy and well made. Think I paid like 5 bucks for them in 1979. Any thoughts? Thanks in advanced. Ted.