70-73 stub frame bushings

I have to pull the stub out of my 73 New Yorker for some rust repair and most of the rubber mounts look pretty rough. I doubt there is a source for new ones but did anyone else come up with something that is easier to find? Maybe truck cab mounts would work?

I saw in another thread someone mentioned using hockey pucks. The height looks about right, but did they use them on the bottom side too? Or just a large washer with the bolt tight against the frame?
Author: 73 NYB