On eBay: (ignore the au: I'm just in Australia. The items are in the US but I purchased the 40 cavity one and it served me well.) http://www.ebay.com.au/itm/Melon-Ball-Small-40-Cavity-Silicone-Mold-265-/160869424300?pt=LH_DefaultDomain_0&hash=item2574909cac http://www.ebay.com.au/itm/Melon-Ball-Small-9-Cavity-Silicone-Mold-885-/160576044104?pt=LH_DefaultDomain_0&hash=item256313fc48 Alternatively you could just use a square loaf mould, make a soap recipe that's not extremely hard and use a melon baller yourself to make round soap balls. There's also the option of going on eBay and getting cheap cake pop 2 part moulds, those I also use if I want to have bigger balls or a combo.