Hi
I have one of these hubs that I built up into a front wheel. I bought it very cheaply from Ebay.
The hub will fit a standard 20 mm fork and use a standard calliper with a bit of fettling
Contact Hope they will make you a disc rotor.
However there may be some clearance issues. The hub is wider than a standard 20 mm hub and therefore I had to take a file to the disc calliper and the fork leg (only a mil or so on the fork leg to allow the rotor bolts to clear). The calliper hits the spokes if you don't shave some metal off this.
It is do able and the hub is a lovely piece of kit which builds into a super smooth strong wheel.
Hope this helps
Cheers
Matt