JS550 Crank Thrust Washers

I took some measurements of the lower connecting rod thrust washers to find a set to use. I'm having no luck finding some. Any idea what they are made out of or any info on were to get an alternative. Any help would be appreciated.
 
copper and babbitt plated steel.
they usually come with the rod and bearing kits.
can't recall seeing them sold separately.you could ask crankworks or competitive crank...
 
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