Looking for a two- tone, high/low, double air horn set for a '16 Indian Chief, Vintage. Gotta have install directions and guarantee that it'll fit and work properly.

G'day from OZ ( Australia ) guys I'd really like to fit a LOUD Klaxon horn ( or some air horns ) to my 2013 Vintage Chief ..... but I'd like to find out : A) Is this possible ( given the complexities of the Can-Bus wiring system ) and B) Do I need some sort of "isolator" as well as a...