[brucepick]

Also check blueprint shops - I stumbled across one that also does signs and super sized posters etc on Coroplast. One time they had a huge scrap piece because the print job had messed up somehow so I got it for very little.

Next time I will go there with a 4x8 plywood plus some plywood cut into long strips 6" wide. Sandwich the coro between the full wood sheet and some strips around the edges. Screw layers together. Transport on station wagon roof or in pickup bed.