Laptop bag for 18.3 inches?

Do you know where you can find good, large laptop bags or notebook bags for an 18.3 inch laptop, you can only find one on Amazon and I don't like the reviews because it's inadequately padded. The bag can also be larger so that the charger still fits next to each other and does not lie on top.

Just search on Ebay.

18.3 inches should be pretty standard and Amazon is overpriced anyway.