I have been in contact with White Industries about the hubs. Just FYI; they do offer the Campagnolo N3W freehub but only for their CLD hubs. For the 3T cassette, I will need the SRAM XD or XDR driver.
So after much deliberation I am relieved that the research is finished and the building can soon begin. Lead-time on the hubs is at least 5 weeks. I'm thinking 8 but we'll see.