For the cookies: Preheat the oven to 350 degrees F and line 2 baking sheets with parchment paper. In a small bowl, whisk together the flour blend, oat flour, quick-cooking oats, pumpkin pie spice, baking soda and salt. In a large bowl, cream together the softened coconut oil, granulated sugar and coconut sugar. Beat in the egg and vanilla. Stir in the flour mixture in two additions, alternating with the pumpkin puree, stirring just until combined. Stir in the cranberries.
Place some old-fashioned oats in a small bowl. Using a 1 3/4-inch ice-cream scoop, scoop up cookie dough and drop it into the bowl. Roll the dough in the oats to coat. Place the dough on a prepared baking sheet and repeat with the remaining cookie dough. Bake until the cookies are golden, about 25 minutes. Let cool on the baking sheet set over a wire rack.
In a large bowl, whisk together the rice flour, tapioca flour, potato starch, xanthan gum and salt.