Check out Nanobot original concept 3D model on CGTrader for $119. High-quality mesh by GuidoVrola: 19059 polys, 18591 vertices. Textured.
OBJ (OBJ, filesize: 973 KB), 3DS (3D Studio, filesize: 517 KB), FBX (Autodesk FBX, filesize: 787 KB), BLEND (Blender, filesize: 689 KB)