Stereoscope Slide Scanner
This is made to work with the size/shape scanner as the JJC Negative Film scanning slide holders (https://a.co/d/i7bqLRn)
The assembly should more or less snap together and stay held together with a friction fit, but you can always glue it if need be.
Holds two stereoscope slides at once.
When/if I figure out how to digitize the stereoscopes for VR, I'll post here.