This looks like a good idea!
A possibility could be to use https://virtualtabletop.io/ to showcase an online version of the dice, it's an open source website inspired by https://playingcards.io/ it also supports PCIO format. It would be more accessible than using Tabletop Simulator, since it wouldn't require a download to test it out.
I'm curious how do you actually plan to use the dice, I'm not very familiar with the Genesys die you drew inspiration from, but I wonder what kind of impact the symmetry would have.
