You mean the bent piece of cardboard with aluminum foil on it? Go bend your own piece of cardboard and cover it. I used automotive chrome/reflective tape...it was about 4" in width. Super shiny and smooth. I had to use 2 pieces, with the seam right behind the blacklight....making it invisible. Now, on Discs of Tron, they used a piece of polished metal instead. Sturdier, but gets pitted and tarnished. Fortunately, Naval Jelly polished that one right up!