ur link didn't work, but i'm assuming u are talking about the zen-esque dura ace chainring. i dont think they even have a model name/number, but i've seen pictures of them being used in the olympics and world championships. a friend of mine locally has one on his 650c havnoonian and it's pretty nice. but i cannot justfiy spending $140+ on a chainring.
Remember, being stamped NJS just means you can race it around a track in japan. It doesn't mean anything about quality. Think about it like real champagne, it was most certainly grown and bottled in France, but that alone doesn't mean it's going to taste like stars.
yes the chanring is the zenish one. it would be nice to have but i dont think i would ever find it or even know where to look. i guess if i ever upgrade from my andel's thats where its gonna be though.