If you go to a wrecking yard to collect parts for the AC, pick evap and condenser cores that still have the hoses attached. After you remove the hoses, cap the ends immediately with some tape or something to keep the air and contaminants out. My suggestion would be to get new hoses that are made for R134a so you won't have any bleed through the hoses by the lighter components of it. You should however get a new accumulator.