Thanks guys!
I use STAT as my tracking tool and, before posting here, I asked my account manager about it - he told me they don't support this feature yet but they liked the idea, so they might write it down for future development. I understand it might take a while until one of these tools offer a feature like this, as it seems only a few are requesting it.
Thanks Kane, I will ask around about how feasible would be to build our own scraper in house. That's a good idea.
I'll get in touch with some other rank trackers, will let you know if I find any 