Do they make?

Do they make CD slot binder inserts? i dont want to buy one of those expensive CD book things, fill it, then have to start stacking my CDs again. I was to be able to buy binder inserts so i can just get more if i need to and not have to buy a new book thingy.

or, is there any other cheap way to store lots of CDs so that i can get to them easily?