Check out lockheed D-21 3D model on CGTrader for $22. High-quality mesh by chtazi: 53901 polys, 133629 vertices.
SKP (Sketchup, filesize: 2.38 MB), BLEND (Blender, filesize: 1.55 MB), OBJ (OBJ, filesize: 2.44 MB), FBX (Autodesk FBX, filesize: 5.85 MB), MAX (Autodesk 3ds Max, filesize: 987 KB), C4D (Cinema 4D, filesize: 1.85 MB), MA (Autodesk Maya, filesize: 1.91 MB), GLTF (glTF, filesize: 2.09 MB), DAE (Collada, filesize: 952 KB), STL (Stereolithography, filesize: 1.81 MB), 3DS (3D Studio, filesize: 1.61 MB), 3DM (Rhinoceros 3D, filesize: 2.78 MB), BIP (KeyShot, filesize: 2.42 MB), JPG (JPG, filesize: 2.42 MB)