Mark,
look around for a clutch and brake rebuilder. We have one in Birmingham, AL called Automotive Friction. They can usually get direct replacement linings etc or if nothing else is available, they can get bulk lining material, cut to size and drill, countersink and rivet it on the shoes.
When we did the 212, the linings were no longer available from CAT to replace the one that had sloughed off. Since I needed only one shoe redone, we did the cutting, drilling and riveting here. It wasn't cheap, seems like around $60 for the materials.
D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time๐