So currently I have a 2x3 C&C with a shower curtain underneath everything (my piggie can't get to it). But I want to do a base sort of thing but I can't find coro. I went to Menards and asked about big sheets and they said they only had the signs that were being sold. So i bought plain signs and built a base with maybe a 1 inch wall. I am not near any sign shops (please don't look up Chicago Sign Shops I don't live in Chicago I live in the suburbs). Does anyone have any alternatives that they know definitely work?