Overhaul of Smith friction dampers.
I managed to get some "Mouldable" brake lining material. If you heat it to about 90c ( in front of my workshop gas stove), it is pliable. So I cut a length, heated it, put it around a 3" diameter piece of steel, jubilee clip tighten up, in front of fire for 10 minutes. Removing jubilee, perfect circular "Friction" ring held in place by a 1/8" ali rivet.