Ive just got hold of a hollowed out darth vader lightsaber. All electronics have been removed so i need to find some parts to finish it off for display purposes. My main problem is the emitter. I understand internally it should be a coiled spring with a nut in the center. Any ideas on how i could recreate this? i have very little skill or tools so ideally id like something that i could just buy and then glue in place. Any ideas?