I have mine mounted lower, in a new hole on the lowest section of the head light bracket.
The bolt that the turn signals are mounted to , and includes rubber mounts for the fairing, now have ordinary nuts on them.
It's equally important to get good distance from the headlight beam, for other road users to see them clearly.
So, my solution was lower as well as wide - such as the long version of these
http://www.monsterparts.com/pc/MINIVIPER/Elec-Signals/MINIVIPER.html