You can buy it through your Xbox360 Dashboard or on Xbox.com: > Here <
It's a sweet bit of kit and probably better than other pieces of Avatar gear in the price range. I guess the problem at the moment is that with so much choice on the store there's an increasingly high likelihood you'll already have a prop you're happy with. Hopefully in a future update (or next gen) Microsoft will look into ways of allowing us to apply multiple Avatar props. If you could combine this with 343 Guilty Spark or the Energy Sword for example then I think that'd be a compelling reason to keep buying the props. Alternatively they could allow us to select multiple props and have it cycle through them.
- Cowboy Out.