Just been sourcing an array of display cabinet impossible cost ,can be more than the model.
So dug arround in my old data sheets from a few years ago and found laminating sheets
Basically using A3 laminator
run the sheet through once soft let cool and floppy run a second time it when cool is harder put through 3rd time when cool it’s harder and clearer almost like glass ? ( you MUST lay on flat surface each time or will distort)
Hope this helps Dave