isn't there a thread for coroplast & such accessories? isn't it better to follow up on the topic in the appropriate section to facilitate searches :important
meanwhile, in our area, it is currently available at home reno places (reno depot, rona, home depot, etc) AND at artists supplies stores (wallacks, deserres, loomis, etc) for cheaper than sign companies...
as an example, here at wallacks artists supplies store, a full pannel 4'x8' in the 4mm sells $28cdn and the 6mm sells $37cdn
recycling coro pannels after elections is a great option too - certainly ECONO AND ECOLO - until one can afford, or prefers to buy a clean pannel... i have 2 small pieces found after elections... however, who wants to have these guys' faces and vibrations in his/her home :silly: