That thread that was linked, the OP stated that the thrust sheets didn't really work and the noise was related to spring bind hence why he installed the plastic spring isolators.
If you are set on thrust washers have a look into torrington/needle bearing washers or swift option
https://www.swiftsprings.com/products/misc/
Example
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Previous Rides: 13' 135i, 08' 130i, 03' HKS Turbo'd 350z, Modded GC8 WRX, NA MX5