Custom Worm Gear Reducer Design

I need a complete Worm Gear Reducer assembly fully built in Autodesk Fusion 360 and exported as a clean, error-free STEP file. The model must include every internal and external component—worm, wheel,... (Budget: ₹12500 - ₹37500 INR, Jobs: 3D CAD, 3D Design, 3D Modelling, 3D Rendering, Assembly, Autodesk Fusion 360, CAD / SolidWorks, Mechanical Design, Mechanical Engineering, Solidworks)