Yes you can buy them seperately, you just have to ask. I remember the day I discovered that during some particularly exciting release, maybe it was Lilo and Stitch? Anyway.. It's called the loose change menu. Some shops don't have it advertised, particularly if they are small, but it's always there. Everything is one dollar or two dollars. It's not a special. Small fries are one dollar, double cheese burger is two dollars.. I just googled it, you have it too!! You're like the tenth person I've told about this amazing fact.