Gill - the "copper spring clamp ends" you likely have in mind are welding ground clamps, you could use them to "fake it", but this style is about as "vintage" as you get, and you I doubt you'd find'em new now

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot