Not natively as you have found. On the basis this is the first time I have seen that question posted on any authoring forum, I doubt it would rate as a high priority feature change.
A polite version of "you want it, you do it" seems to be the answer to your developers. I say that as whilst you could purchase a suitable tool, why spend the money when they likely already have something.
See www.grainge.org for RoboHelp and Authoring tips
Thanks Peter. Just as I thought! I will use the "you want it, you do it" approach and thanks for the link, I will check that one out.