Check out NH - T9 Articulated Tractor - With Rubber Tracks System 3D model on CGTrader for $139. High-quality Polygon mesh mesh by markos3d: 7819588 polys, 3982615 vertices. Textured, UV Mapped.
STL (Stereolithography, filesize: 103 MB), OBJ (OBJ, filesize: 79.6 MB), C4D (Cinema 4D, filesize: 50.5 MB), 3DS (3D Studio, filesize: 27.9 MB), MA (Autodesk Maya, filesize: 55.5 MB), LWO (Lightwave, filesize: 86.2 MB), MAX (Autodesk 3ds Max, filesize: 8.71 MB), HRC (Autodesk Softimage, filesize: 57.2 MB), FBX (Autodesk FBX, filesize: 43.4 MB)