It's frustrating that nobody ever explains how to make your own key caps.
1: https://www.cherrymx.de/en/dev.html 2: https://youtu.be/yYcNi9hKxDk?t=688 3: https://thangs.com/designer/ZackFreedman/3d-model/KeyV2%20G2...
Then there's the whole "artisan" community, which sculpt and cast individual keycaps in various designs and shapes, more for looks and collecting than for typing on. I've seen group buys of tooling for making these.
1. <https://www.wasdkeyboards.com>
2. <https://en.xvxchannel.com/en-eu/products/xvx-custom-art-icon...>