I have a wiring assembly that was chewed up by some animal (likely groundhogs). The dealer is reluctant to just splice repair it and the whole harness is no longer made and I am having trouble finding a used part to give the dealership. It's a 2009 F150, 5.4L, 4x4, automatic with FX4. The dealer says the part number is 9l3z12a581sb (I think this is called a "transmission wiring assembly"). Any suggestions?