Airco DH-4 Royal Navy Seaplane (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 79399 polys, 41076 verts.
MAX (Autodesk 3ds Max, filesize: 447 KB), OBJ (OBJ, filesize: 1.14 MB), DWG (AutoCAD, filesize: 1.46 MB), DXF (DXF, filesize: 2.03 MB), 3DS (3D Studio, filesize: 482 KB), MAT (mat, filesize: 4.37 MB)