These biscuits are are sold in the major supermarkets here in Australia. I've also seen them in Aldi - they're called European spiced biscuits. If you can't find them where you live, no worries! You can either skip them altogether, or just use another kind of dark, crunchy biscuit. Any kind of caramel, ginger or dark and buttery crunchy biscuit will work well. You only need a few!