OOOHHHHH!!!!! If you're going to go and build a hardware store Neuralizer... you HAVE to post progress/tutorial/pics... THE WORKS!!! I've always wanted one of these even though I made one for the premier of the film out of a toilet paper roll holder and a red led/battery/switch. It was cool for the time because on opening night, I was at the movie theater (I worked there) dressed in a black suit Neuralizing people!
Anyhow... I know this might rattle some feathers but have you considered looking into vibrator casings... ya I said it! They make those things in ALL and I mean ALLLLLL shapes and sizes... might even find one already chromed!:lol