Making a coffee cake...?

I'm attempting to make a coffee cake from a Sneaky Chef cookbook. The crumb topping calls for 2tbsps of oat bran and I don't have any. I also looked up on other websites and people say to use oatmeal but, I don't have that either. Here's the recipe. Crumb Topping: 2tbsps oatbran, 1tbsp of flour blend(this consist of flour, whole wheat flour, & wheat germ), 2tbsps brown sugar, 1/2 tsp cinnamon, 2tbsps er... Whisk dry in gredients to together. Then use fingertips to mage er into the dry mix and make clumps. Any help is much appreciated. Thanks!