Identity Disc holder for Kevin Flynn from Tron Legacy. You can print in white or black to fit either outfit of his. Also features a hollow center for EL inverter electronics. I recommend the HY-DC3000 (via alibaba.com) and it features through holes for wires to touch glue in place magnets if you intend on having a supplimentary powersource to keep your disc lit while it's on your back.
Video is a slightly older version that was too think on top. But the rest is identitical.