Check out EBay for Sandmans Mel....they are posted on EBay by the same woman who makes them at Sustainable Hemp Products, but she puts up a few on EBay every month. They are the same price, but free post and usually large sized.

Hunt round for wool soakers - you don't have to use the BBH covers with the BBH night nappies, you can mix and match. So check out the WAHM Naps site, Oze Baby and Parrot Pants for woolen bottoms

Also, don't forget about Buy For Baby (au site) which is a second hand nappy auction site - fab value.
HTH