Rubber tip on the brake rod

Hilarious, - you answered the question in your first three words.
You still run bias tires ? Lol
You go into a parts store with the old one, dude goes in the back, comes back with a little chunka hose from a multiparts box.
You ask him if it's the " proper" one or a universal one ?

No, I tell the “parts store dude” he’s wasting my time because that’s not the part I asked for because I know the real part isn’t a chunk of hose.

But I wouldn’t show up with the old one anyway, I’d show up with the part number and I’d already know if his inventory showed it in stock because I’m not wasting my time to drive down there to throw myself at the mercy of some parts store dude.

And I sure as hell don’t run bias ply tires, but I don’t run factory suspension specs either.