While official DLC from KISS provides some V2 options, the vast majority of "cm3d2hairv2 full" content is user-generated. Creators often share their work on platforms like Pixiv Fanbox or dedicated modding forums.
Before installing any mod, your game needs a plugin system like or BepInEx to read and load custom files. Here's a basic setup guide for Sybaris: cm3d2hairv2 full