Small harvester 3D model is available on CGTrader for $20. Original author: jaketnet2012.
FBX (Autodesk FBX, filesize: 83.8 MB), MAT (mat, filesize: 77.2 MB), PNG (PNG, filesize: 77.2 MB), JPG (JPG, filesize: 77.2 MB), MAX (Autodesk 3ds Max, filesize: 77.2 MB), PDF (PDF, filesize: 77.2 MB), SLDPRT (SolidWorks, filesize: 77.2 MB)