where can i buy the pink and green 4x4 vacuum lines that go from the solenoids to the differential actuator?

 

I may be nylon tubing or synflex tubing that's used for air brake applications. Truck part supply places should be able to supply the product. Take a sample with you. Did you try Ford first as some lines may be preformed with sharp angles which is hard to do with tubing. You can also search for them at the local junk yard.