Tie Rod & Drag Link Cups: Steel v. Teflon v. Bronze

[1930-Pickup]

I'll be rebuilding the front end soon, but I want to complete my research first.

I've seen a couple of posts about this subject.
Those posts are hiding from me, like fame and fortune.

Steel.
We all know this is the original material.
Its durable and cheap, but pressed steel parts make lousy bearing surfaces, even when greased.

Teflon:
The suppliers sell them.
To me this is an odd choice because Teflon is a fairly soft material.
In this application its taking a lot of direct and forceful impacts.
I'm not saying they don't work, I'm just surprised if they last.
I like Teflon, it has many great applications, but I'm not sure about this one.

Bronze:
One of the best bearing materials out there, even if you forget the grease.
Do they exist? Have they ever? Is someone making them?
I know I've seen something about them...somewhere.
I can't say they are better or worse, I've seen no reviews.
I like the idea though.
(edit 9-23-2020 2158: This is not bronze impregnated Teflon)

Does someone have information about bronze cups availability and performance?
.