Is there a usable Unity Model asset?

I would like to use the "Unity Model" (the default humanoid character for previewing retargeted animations) as a reference model for creating retargetable animations. I found that animating him would be the most straightforward way to make sure the animations I create will be retargeted properly.

Is there any way to get him as a project asset?

I have not found a corresponding file in Unity's install folder (it's probably baked in there somewhere), and neither is there a way to download it in the Asset Store.