From my professional experience I cannot imagine that a reputable
company as KM/Sony would offer free repair for the first frame
black problem (FFB), knowing that there will not be parts.
Thinking about possible explanations, I am only guessing.
Possibility 1:
Since Sony announced the free repair of the FFB problem,
undoubtedly many KM users must have jumped the gun and sent in
their camera. Therefore there could be a temporary shortage of
parts; but the drawings of the redesigned part are still available,
so these can be ordered, but judging on what in our business is
normal, a lead-time of 4-8 weeks is pretty much standard.
In order not to have the customer have to wait so long,
Sony/Precision would offer exchange or buy back.