Yes it's in the ".Blend files" download it's the "Amicus_rig_V1.0" file.
The rig is not configured for VRChat but with some edits you can make it compatible.
i already made an VRChat Amicus avatar in my Adastra world though but i didn't have an high enough rank to publish it so i'm working with StreamArcanine to publish it. He's also working on his own Amicus avatar which is in my opinion way better then mine because i don't play VRChat or have any experience with Unity.