Your best bet would likely be to talk to G&G or Alembic and see if they can find or make you a case for it-I can't imagine how huge the point body is on a 6, since mine's pretty large, and it's only a 4.
I probably need to do the same thing-I'm beginning to distrust the gig bag I have due to its age, and the Anvil case that came with the bass is way too unwieldy for anything but flight.
Did you check out the Probag stuff I linked to in the (former) sale thread?