Savoia-Marchetti SM79-T Low-poly 3D model is available on CGTrader for $15. Original author: Helijah. Specs: 224000 polys, 189000 verts.
STL (Stereolithography, filesize: 16.9 MB), OBJ (OBJ, filesize: 30.3 MB), BLEND (Blender, filesize: 33.5 MB), OTHER (Other, filesize: 34 MB), FBX (Autodesk FBX, filesize: 12.6 MB), PNG (PNG, filesize: 3.67 MB), GLTF (glTF, filesize: 18.2 MB)