Winch bar design assistance needed

[Tonka]

Hey all, am attempting to build a bar with winch mount for the lux (84 ln65 doublecab) for a 12000lb runva, i am having difficulty finding designs to reference, if anyone has built one and can help me out with pictures and tubing sizes/metal thickness, especially mounting points (as due to the shackle position i cant run a support down the side of the chassi) it would be much appreciated. cheers.