Opel Astra G Coupe Bertone (Polygon mesh 3D model) is available on CGTrader for $65. Original author: Carmodels3D. Specs: 335000 polys, 364998 verts.
MAX (Autodesk 3ds Max, filesize: 44.6 MB), OBJ (OBJ, filesize: 50.2 MB), FBX (Autodesk FBX, filesize: 20.5 MB), MAX (Autodesk 3ds Max, filesize: 44.6 MB), 3DS (3D Studio, filesize: 15 MB)