Would be simple to do:
- Acrylic Piece cut-to-size (Lowes)
- Velcro (Lowes)
- LED light strip (AutoZone)
Small Rotary tool to cut the size from the side of the shell, about 1" smaller than the acrylic cut-size dimensions, and file all edges smooth. Mount the acrylic on interior-side with Velcro (or Gorilla Tape).
Then, add a small LED strip light directed downward from the top edge over the card.