After looking a few months for display cases for my ETB I just decided to make them myself. Total cost per case $12-16. Manufacture time 30 mins.
What you need
Acrylic sheets 1/16" thick: Cost $12 shipped (cheaper for bulk purchases)
(1) 3.5" x 7.5" (This is the base)
(1) 3 5/8" x 7 5/8" (This is the top)
(2) 3 5/8" x 6.75" (These are the end pieces)
(2) 6.75" x 7.5" (These are the sides)
I get mine on Ebay precut to my specifications.
The large sides go flush with the base not sitting on the base. The end pieces go on the outside of the sides, not between them. And the top sits on top of the sides not within them.
Acrylic Hinges (optional): Cost $6 for 10 shipped
2 units per case
You can seal the box in the case if you want, otherwise you need hinges
Acrylic Cement and Applicator: Cost $14.50 shipped. Does 50+ boxes