Super Blue was only available in the Endura, Delica, Stretch, Dragonfly, and Man & Ladybugs from Seki, then Caly 3 & 3.5 from Moki. And all are now Disco'ed.
I REALLY wish they would continue with some Super Blue and do some Sprints of other models with it, like the Double Bevel, Starmate, Lum Tanto, Breeden Rescue, etc., etc... one can dream.

Even if they just brought back the 2 Calys with it I'd be super happy!
ZDP-189 is still current and much more prevalent. In FRN it was British Racing Green FRN most recently (in the Seki models listed above), and a few other colors in older models like burgundy and black FRN...
Some with CF handles like Stretch and Caly 3 & 3.5...
I too would like a Nishijin at some point. Never owned one. A Nishijin R would be pretty nice.
I'm pretty anxious to check out a new Stretch 2 G10 ZDP-189.