Boeing E-3B Sentry USAF 2 (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 44488 polys, 24908 verts.
STL (Stereolithography, filesize: 731 KB), 3DS (3D Studio, filesize: 346 KB), MAX (Autodesk 3ds Max, filesize: 398 KB), LWO (Lightwave, filesize: 346 KB), DWG (AutoCAD, filesize: 760 KB), TEXTURES (Textures, filesize: 2.24 MB), DXF (DXF, filesize: 766 KB), OTHER (Other, filesize: 998 KB)