Industrial Walls Collection 1 - 20 pieces 3D model is available on CGTrader for $12. Original author: 3d-armen. Specs: 1266228 polys, 1172817 verts.
MAX (Autodesk 3ds Max, filesize: 86.2 MB), BLEND (Blender, filesize: 53.1 MB), OBJ (OBJ, filesize: 55.2 MB), FBX (Autodesk FBX, filesize: 46.6 MB), STL (Stereolithography, filesize: 41.3 MB)