Hi, welcome to TBN. Check with a local alternator repair shop. If they can't source parts for your alternator or repair it they can probably order a new replacement.
check ebay. amazon they have fuel lines listed for sale. if u go to a carparts place make shore u get a lowspeed start model. or it wont charge less ur reved over 1500 all the time.i got a case with a 1 wire but high speed start. wont keep battery charged if using the glow plugs.or not reved up to pto speed.
are 4wd 665 has the alternator off a 555 for last 10years. fit same way. but think we needed a shorter belt. havent noticed any issue with 10 less amps charging.