Montex do masks for the 190-D so should fit they cover a range of markings, The national and standard markings should be okay & some of the other code no's etc might be good for a 190-A especially if you aren't too worried about accuracy.
Airfix may even have the decal sheet as a spare as the kit pops up now and again (I have one in my loft but can almost guarantee my decals are perished.
Keith