First of all your not supposed to use chat speak in this forum.
Second, most people use cloroplast. Some use linolium(sp?). You can buy coroplast in sighn stores. If you go to www.guineapigcages.com you will find all the information that you need, including a place to find coro that is close to you.
We use coroplast, it can be purchased at a sign store (sometimes plastic stores). Look in your phone book. Prices range from $6-$30 for a 4ftx8ft sheet.
See here to find coroplast and cubes in your area https://guineapigcages.com/where.htm
If you can not get coroplast you can use linolium.
Also see this link- https://guineapigcages.com/howto.htm
Coroplast is Corregated Plastic. Also known as Correx and other names.