Our supplier has no problem taking back a part & checking to see if there are any fitment problems by checking it against the mold. If no problems are found they will let us know. If there is a manufacturer's  defect they have no problem making it right & replacing the part.
  They will not replace any painting or shipping costs. The parts should always be mounted & test fitted before installation. You never want to paint an item until it is properly fitted. When ever you have an item that is aftermarket there "can" be some slight modifications to make it 100% correct to your liking. Please Keep in mind the vehicles are 20+ years old now & could have been wrecked or raced where the body is not aligned 100% like it was the day it was built.