I emailed Kadee back in December asking that very question. Here was their prompt reply:
Yes, we do have plans to eventually bulk pack our whisker couplers but it
will be quite sometime down the road. Since these take so much longer to
produce we are building another machine to increase the production and when
that is finished then we'll be able to introduce bulk packages of these
couplers.
Sounds like it's coming, but may still be a while.