You can mount the full fairing and the headlight assembly from a Kawasaki Ninja 650R onto the ER6N , you will need all the original mounts, nuts, bolts and grommets form a Kawasaki dealer. Some mounts probably will need to be welded on the chassis. This way you will get a neater fit that resembles the stock Kawasaki Ninja 650R more closely.
Also the complete Kawasaki Ninja 650R fairing probably costs a small fortune, and you may want to look at alternatives from companies like Catalyst Racing Composites who sell aftermarket Kawasaki fairing a bit more affordable.
Anyway, selling your Kawasaki ER6N and buy back a Kawasaki Ninja 650R is the cheapest solution...