I've heard back from Coker, and Tire Rack. Neither knows anything about this "new" -ish tire in WW.
So perhaps it won't be available in the USA.
Just as an FYI, with WW being more popular in USA (and disdained frequently in Europe), and probably half the world's Pagodas (and similarly situated MB using that tire size, from the '60s etc.) in the USA, this doesn't make much sense on the part of Michelin...