Check out SciFi Cube Object No 45433 Low Poly Shape Low-poly 3D model on CGTrader for $4. High-quality mesh by 3dmodelbase.
STL (Stereolithography, filesize: 1.25 MB), OBJ (OBJ, filesize: 2.5 MB), 3DS (3D Studio, filesize: 652 KB), C4D (Cinema 4D, filesize: 1.24 MB), FBX (Autodesk FBX, filesize: 9.85 MB)