40ft Shipping Container Tex v2 (Polygon mesh 3D model) is available on CGTrader for $29. Original author: dragosburian. Specs: 58384 polys, 60056 verts.
BLEND (Blender, filesize: 17.2 MB), OBJ (OBJ, filesize: 7.56 MB), FBX (Autodesk FBX, filesize: 9.14 MB), STL (Stereolithography, filesize: 4.29 MB), DAE (Collada, filesize: 8.27 MB)