Piper Cherokee Six 300 V05 (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 40854 polys, 21530 verts.
STL (Stereolithography, filesize: 671 KB), OBJ (OBJ, filesize: 1.41 MB), DWG (AutoCAD, filesize: 774 KB), LWO (Lightwave, filesize: 526 KB), OTHER (Other, filesize: 1020 KB), 3DS (3D Studio, filesize: 309 KB), DXF (DXF, filesize: 752 KB)