If you're looking for a replacement, any small gluten free cookie will work (and these are usually much easier to find). If not, shortbread cookies work really well, and are just as yummy! In fact, I prefer shortbread cookies to vanilla wafer cookies. If you're using the vanilla wafers for something like a pie crust, you can try using gluten free graham crackers instead, as these are super easy to find in your local grocery store.