This instructable will show you how to use an Epilog laser cutter to make a set of the useful tiles. If you do not have a laser cutter, you can use Ponoko or similar laser cutting services to make yours.
Step 1: Supplies
Sheets of Acrylic (32 dollars for a 24x34 inch piece from Tap Plastics)
A Laser Cutter
The template that is attached
I included 2 templates, one for 1 set and one for a set of 39. They can be edited in corel draw or a similar program.