Right now, they are offering two version of their lights: one for the K2 and DX, one for the K1.
According to the dimensions on their site, the light for the K1 is 1/2 inch shorter (7.0 inches as opposed to 7.5 inches). Likewise, the K1 Executive cover is 7.8 inches tall and the K2 Executive cover is 8.25 inches. So it seems like they have designed the light so that the cover to be 3/4 inch longer than the light to fit properly.
Given they list their Sony cover as being 7.0 inches tall, it seems like both lights would be too long.
But this is all guessing on my part