Check out SciFi Cube Object No 49784 Low Poly Shape Low-poly 3D model on CGTrader for $7. High-quality mesh by 3dmodelbase.
STL (Stereolithography, filesize: 850 KB), OBJ (OBJ, filesize: 1.64 MB), 3DS (3D Studio, filesize: 430 KB), C4D (Cinema 4D, filesize: 965 KB), FBX (Autodesk FBX, filesize: 9.63 MB)