Your situation is not unusual. I would recommend that you retain an attorney to work with State Farm to address your property damage concerns. You should not be left with parts that are not working properly on your vehicle. I would also recommend that you attempt to iron down one person at State Farm to limit the run around when you are calling in. Don't be afraid to ask for a supervisor when you call State Farm.
State Farm may not have to provide new parts for your husband's truck but you do not have to accept used parts that are defective or completely inferior to the parts you had prior to the accident. I would suggest that you make an appointment to see your State Farm representative in person to discuss the problems with getting the truck repaired to your satisfaction. If that doesn't work, I would suggest that you speak with an attorney about any other legal options that you could take against State Farm.