Wall thickness would have to be about 0.047". That's not much.
I'll see whether anyone can direct me to the right donor model, and if not, I'll start measuring tubing thicknesses. Guess if I wanted to be a real wiseass, I could wrap it and silver-solder it.
The annoying thing is that I"m looking for what is essentially a completely undesirable part, which never rusts or wears out, which essentially nobody would have saved, and which was probably still attached to every single car it was on when it was crushed.