And how many of the $1M F-35 bone domes will the Netherlands need? I'm sure that Gripen pilots don't need such ridiculously expensive devices to get the best out of their superb little jets.
Gripen, Rafale and Super Hornet are all compatible with European tankers, whereas F-35A needs a boom tanker, of which Europe has but few - apart from the 2 KDC-10s of the RNAF. No doubt the 'Lockheed Liars' could quote a price for fitting a probe though - then double it.
Gripen or Rafale would suit the RNAF admirably - and end reliance on the US!