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If that is a poly version of corregated cardboard, check with a local sign making shop. They use for making signs for wire frames for sticking in lawns.
Former employer had a side business for making signs and banners.
ASE Master Collision Tech
"Beast" - 81 "S" W/T, 85-360, T-18, Lock-rite,wag alloys, 31-10.50 Pro Comp MT's, Warn 8274 in a fabbed bumper/deer strainer(tested and approved)
88 XJ, 3" lift, 31-10.50's, custom bumpers and winch/tow bar mounts, Warn 9500HS, custom sliders/steps, camo paint, & headliner
Member: FSJ Prissy Restoration Assoc.