Check out 3D CAD Model of a Conveyor Belt 3D model on CGTrader for $45. High-quality mesh by engsandovals. Textured.
STL (Stereolithography, filesize: 224 MB), SLDPRT (SolidWorks, filesize: 224 MB), DWG (AutoCAD, filesize: 224 MB), PDF (PDF, filesize: 224 MB), STP (STEP, filesize: 224 MB)