CAD Optimization for Injection Molding (shell & rib modification) Fusion360/STEP

I already have a Fusion 360 .f3d model that has had multiple runs on a FDM printer, but now I need it re-engineered for higher volume injection molding. The overall look, footprint, and fit must remain... (Budget: $30 - $250 CAD, Jobs: 3D Modelling, 3D Rendering)