Waco CG-4 Low-poly 3D model is available on CGTrader for $15. Original author: Helijah. Specs: 52000 polys, 55000 verts.
STL (Stereolithography, filesize: 4.25 MB), OBJ (OBJ, filesize: 7.05 MB), PNG (PNG, filesize: 2.5 MB), BLEND (Blender, filesize: 10.7 MB), FBX (Autodesk FBX, filesize: 2.5 MB), GLTF (glTF, filesize: 6.3 MB), OTHER (Other, filesize: 10.1 MB)