The washable pads I bought do have waterproof backings, so that the pee doesn't soak onto the floor. I'm sure Joanne or some other fabric store would carry some sort of backing fabric. If you had the right fabric, I'd bet they'd be really easy to make since they're just a square shape.
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |