lift for electric chair

I am looking for this [login to view URL] but only to lift up max 200 kg. Crucial detail is product weight. The target is that the platform will weight 10kg and the platform will be constructed to safely lift up up to 200kg The ramp should be as light as possible. Manual control is possible. Size of the platform 90x60 cm. Please offer price for the final product and final material and weight specification. If it is possible, Working CAD model would be very appreciated.