Walmart (can I say that?) but plan on making one for an upcoming kid birthday party. It's made with 3 large cupcakes, and a LOT of frosting, but I would think you could make it using a loaf pan (which I will try).
https://recipeswap.org/fun/wp-content/uploads/Finer_Kitchens/DawnNYS/front.jpg
https://recipeswap.org/fun/wp-content/uploads/Finer_Kitchens/DawnNYS/front.jpg