I need a dc dimmer circuit with an external switch 12v 10 amps

I need some one to design a circuit board for a very small 3"x 2" footprint dc dimmer module
It needs 2 wires to a battery
2 wires to power LED strips
2 wires leading to an external rocker switch that will be used to control the module
Any questions please feel free to email me at 
I need the design only. I can build it