Check out Storage Rack - Racking System - Industrial Shelving 3D model 4 3D model on CGTrader for $20. High-quality mesh by PT18.
SLDPRT (SolidWorks, filesize: 5.42 MB), X_T (Parasolid, filesize: 1.68 MB), STP (STEP, filesize: 3.75 MB), PDF (PDF, filesize: 202 KB)