For something in the middle of the price range, consider this Moschino Fanny Pack. While the price is very reasonable, this product is an easy wardrobe update.
If you're gonna splurge, then what you're looking for is this Gucci Fanny Pack. It's more expensive but worth your money. While you're at it, also have a look at this Prada Fanny Pack. Yes, this item is expensive, but it does not mean it's not worth it. And how about the luxurious Gucci Fanny Pack? Yolo, right?