Boeing 707 TWA (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 42390 polys, 23403 verts.
STL (Stereolithography, filesize: 675 KB), OBJ (OBJ, filesize: 733 KB), 3DS (3D Studio, filesize: 310 KB), 3DM (Rhinoceros 3D, filesize: 536 KB), OTHER (Other, filesize: 1.36 MB), LWO (Lightwave, filesize: 329 KB), MAX (Autodesk 3ds Max, filesize: 304 KB), DXF (DXF, filesize: 688 KB), DWG (AutoCAD, filesize: 685 KB), TEXTURES (Textures, filesize: 2.36 MB), SKP (Sketchup, filesize: 2.95 MB)