factory exterior 3D model is available on CGTrader for $26. Original author: hezhenze666. Specs: 2452861 polys, 2642666 verts.
OBJ (OBJ, filesize: 220 MB), FBX (Autodesk FBX, filesize: 95.8 MB), 3DS (3D Studio, filesize: 64.7 MB), MAX (Autodesk 3ds Max, filesize: 118 MB), TEXTURES (Textures, filesize: 220 MB), JPG (JPG, filesize: 220 MB)