Zombie - Game Character 3D model

Hi, it seems that when I import into Unity, only the following material slots are exposed: T_Shirt, nail, organic1 to organic4, and pants. There are no slots to assign materials for the arms, ears, eyes e.t.c. Could you resolve this? Model looks very nice but I'm not sure how I can use it at the moment. I figured out how import the FBX into Blender and how to assign materials to vertex groups, which exposes the new material in Unity, but when I assign a material in Unity it seems the UV mapping may be incorrect. Anyway, the zombie is just plain red basically. EDIT: The UV mapping is fine, but when you assign materials to vertex groups in Blender, a lot of the groups overlap - so it's quite tedious setting the materials up in Blender, and guessing which one fits which vertex group, and where the boundaries between materials should be. Took me a few hours but then I was able to use all required material slots in Unity. Didn't figure out the eyes though.

nice model