Nice try, but all those nations operate more than islanders fitted with an EO turret and radar. Granted a couple don't operate large fleets of long range aircraft (because their AOR doesn't require it), but they all dedicate a decent percentage of their defence budget to them and many are trying to improve. Even in homeland defence we have a million square miles of ocean to look after, the most effective and efficient way to do that is with long range MPA.
As for the rest, it is unfair to ask questions you know cannot be answered here. If you are really interested submit an FOI.