There's a great source for truck accessories on the internet called BuyAutoTruckAccessories.com. In particular they have some great prices on tonneau branded truck covers some of the best are even half off!

These truck tonneau covers come in multiple types from hinged covers to leather tarps that snap, or Velcro or roll on. The hinged covers are probably the covers that are the coolest but everything depends on functionality with a truck. I never see any point in dolling up a truck if you loose functionality so make sure you are picking accessories that leave your truck as a truck!

In the meantime, you might want to check out their accessories and those prices are excellent too.