Porsche 550 Spyder HDRI (Subdivision ready 3D model) is available on CGTrader for $79. Original author: dragosburian. Specs: 144350 polys, 141966 verts.
STL (Stereolithography, filesize: 10.8 MB), OBJ (OBJ, filesize: 13 MB), DAE (Collada, filesize: 13.8 MB), BLEND (Blender, filesize: 43 MB)