I am looking for someone to print (8-12) approximately 24"x24" exterior signs for me however, I am not sure what my options are. Last time I had these signs printed the substrate was aluminum and the material used for the printed artwork was the same material used on a vehicle wrap. I want to signs to stand up to exterior weahter conditions and fairly durable to wind. Is there any substrate available that is more durable than coroplast but not quite as durable as aluminum and less expensive than aluminum? The sign needs to be two sided and full color. Anyone interested in bidding on this project please provide me with details.