SZD-36 Cobra Glider V13 (Polygon mesh 3D model) is available on CGTrader for $59. Original author: Dreamscape. Specs: 12858 polys, 7840 verts.
STL (Stereolithography, filesize: 110 KB), OBJ (OBJ, filesize: 224 KB), DWG (AutoCAD, filesize: 133 KB), OTHER (Other, filesize: 118 KB), LWO (Lightwave, filesize: 68.3 KB), DXF (DXF, filesize: 143 KB), MAX (Autodesk 3ds Max, filesize: 95.5 KB), 3DS (3D Studio, filesize: 59.6 KB), TEXTURES (Textures, filesize: 1.03 MB)