Since the night rider is one of a kind, the chances of you finding these parts for sale are extremely slim.
You can buy aftermarket parts and mold them to recreate the look. Try any custom shops in your area and see if they would be up for the task.
For the light bar you could buy a chin spoiler then drill holes and wire LEDs through them. Good luck!
2006 JetWolf Gilbert, AZ. Come race me, I dare you. ASU!