They are definitely available for 335i Canadian M Sport, extra cost $350. However, these brakes, unlike the M Performance brakes, do not come with drilled and slotted rotors.
Also, any M Sport equipped with these brakes and summer performance tires would require 18" wheels/tires for winter. That would mean an additional expenditure of $300-400 over and above the cost of a 17" winter set.
Has anyone successfully ordered m-sport brakes in US, option code 2NH?
Attached is picture is from Canadian Bulletin.