You can always make your own oat flour by using your blender/food processor to turn your gluten-free oats into flour. Just process your oats until they turn into flour. Those who don't eat oats, but eat quinoa might try substituting quinoa flakes. Natural egg substitutes such as flax "eggs" (or chia seed eggs) should work fine; I'd start with 1½ flax eggs and add more if needed to achieve cookie batter consistency. Only add coconut oil if the mixture seems too dry to make drop cookies. For example, I added coconut oil when using natural peanut butter, but did not add coconut oil when using almond butter. Start with a smaller amount of coconut oil, adding a little more as needed until your batter is right for drop cookies.