I have just developed a new plugin that allows you to auto-bind on custom states. In addition, it also exposes a workflow action that can trigger every time the custom state changes.
To view the full documentation: TBW-Plugins
To view a short video with some use case examples: Autobinding with custom states BUBBLE Plugin - trigger events when a custom state changes - YouTube
As always, let me know any feedback and I will strive to make additions to this plugin if people require it!