I'm in the same boat. Need a second set of wheels for my cross bike that runs a 135mm rear hub, 11 speed road, and I'd really like center lock disc brakes since I already have a set laying around. It is really easy to find mtn bike wheels that would be great except for that 11 speed road cassette part.
I believe DT Swiss mtn hubs will also work but you have to change out the freehub body for their 11 speed road freehub body which is around $70-90.
DT Swiss Freehub Body for 11 Speed Shimano Compatibility - Wheelbuilder.com