This bass is still available and the price is dropped officially to $1900 plus shipping. I thought I had another deal done at that price, but logistics seem to have caused a breakdown in the process.
Pictures of the electronics cavity have been sent to Alembic and the Signature electronics are confirmed. There is some electrical tape on one of the pickup leads because it was too short and the other has a lot of slack making it appear that the pickup positions were swapped for some reason. The routing works is pretty clean and I still believe that Alembic did the upgrade as advertised, though it is certain that someone else did the pickup move (if there was one) as Alembic wouldn't have gone the electrical tape route.
Here's the pic of the cavity if anyone wants to see it:
