Preheat oven to 375 degrees. Lightly grease a baking loaf pan with coconut oil, then lightly flour. Combine flours, cornmeal, baking powder, coconut flakes and salt in a large mixing bowl. In a separate medium-sized mixing bowl, whisk melted coconut oil, maple syrup, champagne, eggs, and vanilla. Pour wet ingredients into dry and mix until incorporated. Pour the batter into baking pan and bake 50-55 minutes until springy to the touch and an inserted toothpick comes out clean.