What can I use instead of coroplast in a c&c cage for guinea pigs?

I cant seem to find coroplast anyware and I wont buy online so what else can i use. I herd of using linoleum but No one sells linoleum were I live. I already have the cubes for the making of the c&c cage. What things could I use to make the bottom of the cage. If it helps ill be using fleece as bedding with an underlayer of newspaper and towels. please any help would be greatfull