Finding those 300zxtt axles are impossible for the person who doesnt want to pay for TSR. I wonder where they get them... cause I looked super hard.
Those truly are the only bolt in design (no adapters) at the moment, that I can find anyway.
I was thinking the same as Icehouse with mating the 930 cv directly to the inner (wheel side) stub, but using a stock subaru axle out of the diff. Sending it out to get shortened and splined to fit the 930.
I also did this, which is a subaru stub, machined and welded onto a 930 hub. Then do as Icehouse is proposing.
I just have no time between customers cars and breaking my dailys