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Have not seen those Glen but it sounds like the same concept.
Not sure what they are called but what I think would also work well (have never seem them in the right size) are those wavy spring steel...

What I have been doing on my own re-scales (so far it has worked well)
I make my thrust washers out of copper shim stock as copper has a very high lubricity,When the flat washer is made I put it on...