T-34 85 Interior Engine Bay Full (Subdivision ready 3D model) is available on CGTrader for $279. Original author: dragosburian. Specs: 1049616 polys, 1043706 verts.
STL (Stereolithography, filesize: 34.2 MB), OBJ (OBJ, filesize: 45.6 MB), BLEND (Blender, filesize: 15.5 MB), FBX (Autodesk FBX, filesize: 123 MB), DAE (Collada, filesize: 27.7 MB)