Here's a barebones model, didn't really feel like putting in hours and hours into this. Comes with a PSD to customize the decals and colors.
THIS IS AN FBX. NOT A UNITY PROJECT. YOU NEED TO SET UP THE MODEL YOURSELF AND PUBLISH IT YOURSELF IN UNITY.
https://leopard.hosting/dl/xqyrc/BlockheadFBX.zipFinal model has bending fingers, photo was a V1. A few notes for putting this in Unity:
Under the Model tab of the Inspector, set the Normals to calculate, and the angle to 0, like here.
This forces the model to be flatshaded, as it should
Additionally, you might get a "not in T-pose" error when configuring the bones in Unity
Hit this in the drop down menu and you're gold
Edit: I realize that the Unity default selection of bones for this rig isn't proper so here's the bone list