Luna is a Lunetta-based synthesizer machine from Neutral Labs that can be bought in kit form. It’s not the easiest of builds or the most detailed of instructions but hopefully my build will help you tackle your own. https://neutral-labs.com/luna
Buy the kit from Thonk:
https://www.thonk.co.uk/shop/neutral-luna-desktop/
Or Modular Addict:
https://modularaddict.com//luna-kit-neutral-labs
Buy it built from Perfect Circuit:
https://moltenmt.com/perfect-luna
Or Signal Sounds: https://moltenmt.com/signal-luna