for my 7 month old ds. up till now been using disposables (but the Nature Baby ones, been trying my best!!). I'd really like to use these Kushies ones, but before i go & buy a couple more, i need to get some liners for this one to check they don't leak etc. Have Googled them, but only seem to be able to find full sets to buy. Can someone help out a re-usables novice please!! What do i need & where do i get them??? TIA xx