YehudahYonah,
You are correct the DD is in Lawrence not Cedarhurst. I thought of that in between posts – but never corrected myself. It is though in the “Cedarhurst” area -as things off or on Central Avenue are sometimes grouped in even though some places are in Woodmere or Lawrence technically.
There is also one right by the Hewlett station – immediately adjacent to the Chabad of Hewlett – that is not under the Vaad and does have CY milk available (see above if that helps). And as you said, one in Valley Stream – that I believe does not have any CY milk available – under the Vaad of the 5 towns.