This morning I went to Lowe's (a big box hardware store) and bought 1 piece of plexiglass (30 x 36 inches) for $14.47. Then I had them cut me 3 templates, 18 1/2 " square, 10 1/2" square and 8 1/2" square. Now I have my Fun and Done templates for 8 inch blocks, 10 inch blocks and 16 inch blocks. I already had a 12 1/2" square template that I paid $20 for alone!
This still gave me big leftovers, they said I could bring it back and they would cut again for free (with receipt). What a great deal!