Airco DH-4 Johns Flying School (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 79399 polys, 41072 verts.
MAX (Autodesk 3ds Max, filesize: 439 KB), OBJ (OBJ, filesize: 1.2 MB), DXF (DXF, filesize: 2.13 MB), 3DS (3D Studio, filesize: 490 KB), MAT (mat, filesize: 5.84 MB), DWG (AutoCAD, filesize: 5.84 MB)