Carved Stair 05 White Low-poly 3D model is available on CGTrader for $15. Original author: shabnam3dart. Specs: 1089104 polys, 1127083 verts.
MAX (Autodesk 3ds Max, filesize: 99.6 MB), OBJ (OBJ, filesize: 105 MB), FBX (Autodesk FBX, filesize: 61.4 MB), STL (Stereolithography, filesize: 170 MB)