Single-Cavity Hand Mould Design

I need a single-cavity hand mould engineered for a small rubber component whose job is purely sealing. The finished part will sit comfortably under 50 mm in every direction, so I expect the tool layout to remain compact and easy to handle on a bench press or small hydraulic press... (Budget: ₹1500 - ₹12500 INR, Jobs: 3D CAD, 3D Design, AutoCAD, CAD/CAM, Fusion 360, Manufacturing Design, Product Design, Solidworks)