Fixed Gearbox Specification & Selection

I need a mechanical engineer who can guide me in choosing a fixed-ratio gearbox for an industrial machine now in the design phase. The gearbox will not be manual, automatic, or CVT; I specifically want... (Budget: ₹600 - ₹1500 INR, Jobs: CAD/CAM, Design Optimization, Electrical Engineering, Engineering, Manufacturing Engineering, Mechanical Design, Mechanical Engineering, Technical Documentation)