Although the reviews of this cover haven't been too thrilling, it still could be just what some folks are wanting right now. The Nexus 7 cover is now available on the Google Play store for $19.99. This does not include shipping, which will likely set you back another $10 or so bucks for shipping.
Keep in mind a few things before jumping on this. It only comes in Grey, doesn't have a built-in magnet to turn your tablet on and off, and does not have a double-folding front cover that allows you to make your tablet stand up sideways. If none of those are important to you, then here is the link below.
Source: NexusTablets.net via Google Play Store - Nexus 7 Case