interrupter name in the castbar.
 

I want either an addon or weakaura string that would show the name of the person who succefully interrupted the spell in the castbar of the caster.

For instance, I know some nameplate addons do this, for example "Neat plates" does this, when somebody is casting and if interrupted, then it changes color to red and shows the word "Interrupted : Name_class_colored"

which is very nice information, I don't want to change the nameplate, however I would love to have something that show this, is it easy to do using weakaura?