New answers tagged biscuits
First off, try digestive biscuits. They're really very similar cookies/crackers/biscuits, and it's a common enough substitution that it's even mentioned on Wikipedia. Cook's Thesaurus implies that they're called wheatmeal biscuits in Australia. sourd'oh's suggestion of particularly crunchy gingersnaps might work too, but you'll also want to make sure ...
I would look around the local grocer. There are many other graham products like Golden Grahams cereal, Teddy Graham snacks for kids and Annies Graham snacks, found in the organic section. Maybe you can find graham cracker crumbs in the baking section
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