Boeing 307 Stratoliner TWA (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 91408 polys, 58853 verts.
STL (Stereolithography, filesize: 1.7 MB), OBJ (OBJ, filesize: 1.57 MB), OTHER (Other, filesize: 2.77 MB), MAX (Autodesk 3ds Max, filesize: 373 KB), LWO (Lightwave, filesize: 837 KB), 3DS (3D Studio, filesize: 585 KB), 3DM (Rhinoceros 3D, filesize: 1.37 MB), W3D (Shockwave 3D, filesize: 2.76 MB), TEXTURES (Textures, filesize: 3.8 MB)