Wow I bought a sheet of Coro for that size and while I heard it could be rolled I guess I wasn't trying hard enough... I had to carry it flat for 700 metres back to the bus stop and then the bus drivers wouldn't let me on. I had to call my dad to pick me up from the other side of town. If only I'd known! xD
The coroplast I got for our cage was not so cheap. I think I may have gotten taken as I paid close to $75 for a piece cut down to fit in our car. We have a cage and extra for flooring under play time so... meh.