The second Director's Cut DVD is due for release on the 28th of September.
The title translates as something like:
"Kiddy Grade" Director's Cut DVD 2: Kiddy Grade Theatrical Version part II -MAELSTROM- (Inundation chapter)
RRP is ￥6,000 (￥6,300 including tax) although you can get it for ￥4,725 if you pre-order from Amazon.
According to Amazon it runs for 90mins and is in 4:3. It comes with an 8-page colour booklet and the first press item is a mousemat. I gather there will again be footage of the premiere event included.
「キディ・グレイド」ディレクターズカットDVD2 キディ・グレイド 劇場版第二部 -メイルシュトローム-(氾濫篇) (Amazon)
kidhigureidogekijouban02meirushutoro muhanranhen (Yes Asia)
And so... it is due out tomorrow in Japan. It may be out already, considering that Japan is something like 9 hours ahead of the UK and online stores often ship early. Of course, my copy won't reach me for probably close to a week :(