CowSkull for videogame triangulate, with textures PBR (BaseColor, AO, BUMP, Cavity, Normal Map and Specular) but with UnityPack direcly.
There are blend file, OBJ low poly and FBX file.
Because it is triangulate it is possible 3D printed, it´s closed, no holes.
If you have some problem, please contact me or if you want any model. Regards