Window Bump Stop

[72malibu]

I'm putting my dad's '75 Gentleman Jim back together.

There's a rubber bumper that attaches to a bracket inside the door, at the bottom, for when the window is lowered all the way.

All I'm finding is a dinky little round bumper. I got a pair from AMD that are listed for a very wide range of trucks - early 60s to 90s. But the door seems to have had a much larger diameter bumper and it's toast. I can't find that wide diameter bumper anywhere.

Anybody know what I speak of? It's possible the wrong style bumper was in the truck, because the doors were replaced at one point. I don't have a clue.