Panzerkampwagen III AUSJ M German Medium Tank (Polygon mesh 3D model) is available on CGTrader for $150. Original author: TotemStudio3D. Specs: 663527 polys, 699954 verts.
BLEND (Blender, filesize: 140 MB), OBJ (OBJ, filesize: 15.7 MB), FBX (Autodesk FBX, filesize: 34.3 MB), TEXTURES (Textures, filesize: 167 MB), PLY (Ply, filesize: 14.4 MB), DAE (Collada, filesize: 10.5 MB)