Bump for one of this 2 (preferably the number 1 if possible) :
https://irregulars-inc.booth.pm/items/4947783
https://irregulars-inc.booth.pm/items/4852129
@YUKO if i'm correct, i think you just need modular avatar in your unity project, and once you drag and drop the prefab into the avatar it's set up? ^^