Check out SciFi Cube Object No 51229 Low Poly Shape Low-poly 3D model on CGTrader for $7. High-quality mesh by 3dmodelbase.
STL (Stereolithography, filesize: 788 KB), OBJ (OBJ, filesize: 1.52 MB), 3DS (3D Studio, filesize: 403 KB), C4D (Cinema 4D, filesize: 920 KB), FBX (Autodesk FBX, filesize: 9.6 MB)