Cessna L-19 Bird Dog Low-poly 3D model is available on CGTrader for $15. Original author: Helijah. Specs: 20000 polys, 22000 verts.
STL (Stereolithography, filesize: 1.72 MB), OBJ (OBJ, filesize: 2.89 MB), PNG (PNG, filesize: 3.28 MB), OTHER (Other, filesize: 4.26 MB), BLEND (Blender, filesize: 7.37 MB), GLTF (glTF, filesize: 3.7 MB), FBX (Autodesk FBX, filesize: 1.29 MB)