I'm not 100% certain if there was a batch of 2.15" wheels that circulated but industry standard was 1.9" when Tamiya and AE released their platforms in the 80's
Not sure when 2.0" wheels became standard but I have never heard of 2.15" wheels and I suspect that may be a nominal fitting for the...
Those 1.9" wheels were fairly standard and those bushings can be replaced with bearings, note that older cars use imperial SAE hardware
JConcepts still makes compatible wheels here:
https://jconcepts.net/mono-19-rc10-front-wheel
Tires available here...