That is the suction line, the low pressure side of the system.I looked for a price in the ford parts online and Bill Jenkins site for a price on the line /hose assembly, it's not listed. I would clean off that area well with some degreaser solvent and check the area a day or two from now. I would look closely at the accumulator it's body rusts out, 134A leaks out. If it still has the foam blanket around the cylinder remove it and look for dye traces there.