Fabricating the metal parts wouldn't be very hard to do. The hard part would be getting all the other stuff figured out. The two hoses going towards the bottom of the picture go to the cylinder.
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You will need a valve block from a Cyclops or 3k machine like this.
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You will need one of these to couple it with the mid mount lift block.
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You will also need the lift link and lever for the valve.
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As I said, it is possible to do but there are a lot of tight bends on the lines that are stuffed under the fender pan.
Here are some of the parts needed for a factory looking setup. You will need to fab the lift cylinder too because it is special to the rear lift.
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Good luck and let us know how it goes and don't forget to take lots of pics for us.