If you just want to replace the piece across the firewall that feeds the passenger front then you could measure how far, buy a straight piece correct length/diameter/fitting and bend it yourself. I use a 3/4 or larger socket to bend the line where needed. You should be able to re-use the old...
I converted to disc brakes and have a rusty set of 9" drums from a 68 Dart. Upper and lower control arms, brakes, rotors, drums, hubs, spindles. The hubs are probably in good shape. Let me know if any of it will work for you. Bill