Check out Boeing B-17D Fortress 3D model on CGTrader for $79. High-quality mesh by chipbasschao: 94114 polys, 62780 vertices. Textured, UV Mapped.
STL (Stereolithography, filesize: 106 MB), OBJ (OBJ, filesize: 106 MB), 3DS (3D Studio, filesize: 106 MB), C4D (Cinema 4D, filesize: 106 MB), DAE (Collada, filesize: 106 MB), FBX (Autodesk FBX, filesize: 106 MB), LWO (Lightwave, filesize: 106 MB)