A script could definitely do the job.
However, here's a workaround you might find useful:
Create a smaller object that you place on top of your original object.
Use the eyedropper tool in order to apply original object's aspect to your small element.
Select both and use pathfinder to merge them.
Here you go:
Edit: Here's another tweak:
You can also fake the bounding box using the multi-state feature.
Open Window > Interactive > Object States panel.
Select your object, and click on "new state".
If you have lots of anchored object, you can click on the "select next object" icon in your control panel.