This question has been asked a few times here @ Intel Community. I surely hope support comes back with an answer. ANY answer, this time - but they have not done so the previous times.
There seem to be some new Intel staff on this board since then, hopefully they can contribute something useful.
EDIT: A quick google brought up two suppliers for the connector (Seems to be Kyocera themselves, only bulk) - can't say anything about cables though. Hopefully Intel staff or other members can chime in with something useful.
Both JAE and Omron (probably more) seem to have some 0.4mm SMT components.
N.Scott.Pearson - the caveat to to the (previously referred) availability through Avnet - is a 2000 pc min. order requirement, and a 3 month factory lead time. But by principle, it is available.