The rear may have been disconnected due to corrosion and/or leakage. The front will work fine as the front and rear are parallel systems. New pipes available from Toyota, Amayama, Partsouq or Megazip. Sit down first.
Your best bet may be to have a good refrigeration engineer make up some pipes for you but this may depend on availability or re-use of the old fittings and how the rear has been disconnected. Flexible hoses may be an easier answer or if the pipes aren’t too badly damaged they could possibly be welded up or if you’re practical use the old ones as a pattern to make up some new from ally tube and have the ends welded on.