1975 Porsche 911 930 (Subdivision ready 3D model) is available on CGTrader for $49.99. Original author: dragosburian. Specs: 245590 polys, 240078 verts.
STL (Stereolithography, filesize: 3.89 MB), OBJ (OBJ, filesize: 2.89 MB), BLEND (Blender, filesize: 4.55 MB), DAE (Collada, filesize: 5.76 MB)