I am making a recipe from an american children's cookbook tomorow (indoor smores) that needs graham crackers. I used to live in the US so know what they are, but I can't think of a good substitute. The only thing I came up with is digestive biscuits as they have the right texture, but they certainly do not have the right taste. I tried my local supermarket as it has a section of american stuff, but they did not have them. I may try selfridges food hall tomorow just in case, but I am not holding out hope. What can I use as an alternative?