Hi all! I just recently (possibly) got a job from our local grocery store looking to replace the inserts in their aisle signs (some went missing as well, but anyway) and I was wondering if any of you had any good leads! I did do a quick search already and I think the stuff used is polystyrene? We're looking for 13x3" "stronger than cardstock" material. Any and all help is appreciated (humor especially so)!