Hi, welcome to the group. Your profile says you're a luthier; what kind of instruments do you build?
In a
previous thread on a somewhat similar request, Val's response suggests that a hollowbody, or something similar, is a subject that gets discussed at the shop from time to time. According to Val the research and development will be quite expensive as Alembic will want the results to be at their high standards. So the answer would appear to be that for a one-off custom order, a hollowbody would be exceedingly expensive and probably take a very long time.
It sounds like you are asking that Alembic put non-Alembic pickups and electronics in an Alembic guitar. Again because Alembic maintains high standards, they only use Alembic pickups and electronics. An exception would be the midi pickup, which if I recall correctly, they've done a few of on a custom order basis. And speaking of custom order electronics, because custom electronics go to Ron's bench, and because such orders take time and care, and because there are always a number of projects waiting to get to his bench, a custom electronics order can be a bit of a wait (and not inexpensive).
But I'm just reflecting what I've picked up here in the forum; Val and Mica will be better able to address your questions.