If you wanted DT Swiss hubs you would either need to purchase the hubs and send them to China, or you purchase just the carbon rims from China, and have a local wheel builder assemble everything for you, if you have a good wheel builder locally. I would probably do the latter, if/when I build up another set of carbon wheels.
With my first set of carbon wheels from XMIplay, I ordered them with the Bitex 401F/R hubs and XX1 (XD) free hub. They did a nice job of building the wheels although spoke tension on the rear wheel was a bit low. I will most likely have the LBS bring up the tension on the rear wheels since I do not have a truing station.
Higher spoke tension makes for a stronger, stiffer wheel, but a little more harshness to the ride. I will be doing the same thing for my XR1450 rear wheel, the LBS who built that wheel (after I had to replace the original rim) also used way too low of spoke tension, the DT Swiss wheel needs to be reworked so it will be much stronger and stiffer. Funny that I measured low spoke tension on both my rear wheels, one from the China vendor and the other build up by a LBS. I've done research and I am confident the spoke tension, particularly on the non-drive side, should be greater than what I have measured, which is nearly zero on a Park Tools spoke tensiometer.