[ChrisW]

For interesting looking electronics, it doesn't hurt to check any OLD TV repair shops. I stopped in to one that had been around for decades, told the owner I was doing a mad scientist lab for Haloween and asked if he had anything he didn't need that I might use. I walked away with three boxes of dials, tubes, circuit boards and various pieces that I incorporated into my haunt. The rest went into the electronics recycling box at the dump!