I agree. Shipping the most brittle plastic made via ups is a recipe for disaster. Local is the way to go. I buy some thicker stuff from
Industrial Plastic Supply and it gets here in good shape. But thin sheet UPS takes that as a personal challenge to see if they can break the package with the 'Fragile' sticker on it.
If you don't need Acrylic, pick a material like Polycarbonate - it won't break.
Good luck,
Laughing Larry