Check out IH 1688 Combine Harvester - with Forage Harvester Head 3D model on CGTrader for $149. High-quality Polygon mesh mesh by markos3d: 18096237 polys, 9138858 vertices. Textured.
STL (Stereolithography, filesize: 227 MB), OBJ (OBJ, filesize: 168 MB), C4D (Cinema 4D, filesize: 83.8 MB), MAX (Autodesk 3ds Max, filesize: 11.3 MB), 3DS (3D Studio, filesize: 46.8 MB), FBX (Autodesk FBX, filesize: 76.1 MB), LWO (Lightwave, filesize: 44.8 MB), MA (Autodesk Maya, filesize: 50.5 MB), HRC (Autodesk Softimage, filesize: 102 MB)