skf are oem hubs and you can buy directly from them. I got a good price on sale last fall. I got Zimmermann coated rotors and will do this job when the weather warms up.

According to ATE german tech support: they insist that only a light coat of oil is to be applied to the mating surface of the rotor and the hub.
I felt like skpook that a light film of anti-seez is appropriate, but no, according to the experts. You can check ate and zimmermann tech websites,
they are adamant about this.

There's special wire brush tools to clean the old hub if you reuse it. the hub has to be pristine to avoid runout. See the ate and zimmermann websites for more details, including a break in procedure for new rotors and pads.

avoid cheap chinese hubs and rotors like the plague, they are junk.

good luck, Bill