Hi Bob,
When I was stuck for some correct size friction discs several years ago, I made some from two layers of “FORMICA” kitchen unit laminate, Araldited together, shiny side to shiny side. I don’t know how resistant to grease it would be, but it is worth a try as it cost me nothing and certainly performed well and was durable, in both Bentley and Draper fork stabilisers and an Andre steering damper.
