Amazon.com: (36"x48", 5 Pack) Clear Acrylic Sheets 3/64" (1mm) Thick Easy to Cut PlexiGlass with Protective Film for Signs, DIY Display Projects, Crafts, Picture Frame Glass Replacement etc.
Amazon.com: PET Plexiglass Sheet/Panel 24" x 36" x 0.04" - Pinziren 3 Pack Large Acrylic Glass Alternative, Plexi Protector Cover for Door, Craft Projects, Pet Barriers, Railing Guards, Clear 24x36 x 1mm :