Swim nappies are really only to contain no 2s. They don't do anything for wees. You can get them from lots of places. Kmart, Target, Big W etc have some, and you can get some nicer looking ones from many of the cloth nappy online stores. Or you can use the Huggies disposable ones, which can actually be reused a few times as long as there are no no 2s and you rinse them after use.