According to Games Workshop's website this is a GW exclusive item only.
Why they think they need to alienate every independent stockist and game store by refusing to sell in demand items to them, is beyond my comprehension as both a retailer and a gamer.
Worst part is there is no solid release date listed for it, so who knows when it will actually show up at your door. But people will still buy it.
Look for my review in the near future, until then enjoy your flight! -MBG