Check out SciFi Cube Object No 68428 Low Poly Shape Low-poly 3D model on CGTrader for $7. High-quality mesh by 3dmodelbase.
STL (Stereolithography, filesize: 1.61 MB), OBJ (OBJ, filesize: 3.26 MB), 3DS (3D Studio, filesize: 852 KB), C4D (Cinema 4D, filesize: 1.5 MB), FBX (Autodesk FBX, filesize: 10.1 MB)