Here is a first try for addressable send~ objects. The audio object [my-s~] throws errors to the terminal due to deleted [send~] objects (necessary because only one [send~] object is permitted per name)......... but it works at a cost of a one block delay. There could be other side effects.
I am feeling particularly stupid (even though I am virus ridden... old style) to have forgotten that simple (data) [send] objects can have their address changed dynamically as "standard"!