Trigger post build event without build?

I have a web application (using Visual Studio 2013) where most of the parts are loaded via plugins.
During development, I have post-build events in all plugin projects to copy to the main application plugin folder so that they are loaded automatically.

This works great when creating a plugin, but often I just change the assets (like CSS) and don't require the plugin to be rebuilt, just the asstes copied over again, which would be much faster.

Is there a way to execute post build events without rebuilding the plugin project?

Or is there another way I can call such a copy of the script from Visual Studio.