Check out 40ft Shipping Container CAI v3 3D model on CGTrader for $29. High-quality Polygon mesh mesh by dragosburian: 58384 polys, 60056 vertices. Textured, UV Mapped.
BLEND (Blender, filesize: 17.2 MB), OBJ (OBJ, filesize: 7.56 MB), FBX (Autodesk FBX, filesize: 9.15 MB), STL (Stereolithography, filesize: 4.29 MB), DAE (Collada, filesize: 8.27 MB)