You got so many options.
Leon from Yuanan on the forum (OEM for Elite)
Farsports is never a bad idea, email sales directly (dont use the website, they can make you nice wheels with cheaper hubs for eg)
Peter from Carbonspeed on the forum (the factory that makes the pinarello grevil clone that had a give away a couple of weeks ago.
And the list goes on.
I've (happily) bought wheels from Peter & Farsports, and i am likely to buy wheels from Leon next.
I suggest you go for full T800 (avoid T700), and use sapim cx ray or pillar wing 20 spokes (avoid cheaper spokes).
I'm yet to see any evidence that branded hubs roll faster in any material way, so i'd say, get novatec / bitex / house hubs and save yourself some cash.
Ceramic bearings are pointless mechanically for bike applications, and wear out faster.
Hubs do need maintenance, especially if you ride in wet / gritty conditions.
Putting extra grease in a noisy hub does quiet it down, it takes 2 min, and it's game changing.