20 Ton Jack 3D model is available on CGTrader for $29. Original author: dragosburian. Specs: 8127 polys, 6323 verts.
STL (Stereolithography, filesize: 861 KB), OBJ (OBJ, filesize: 1.45 MB), FBX (Autodesk FBX, filesize: 940 KB), BLEND (Blender, filesize: 2.66 MB), DAE (Collada, filesize: 994 KB)