Oddly enough I have been working on a chart merge application for some weeks and I uploaded the finished version to my web site -
http://www.gmayor.com/mail_merge_charts.htm earlier today.
It should be possible to create a chart close to what you want in Excel and use the add-in to merge it into Word document(s).
In just a couple of minutes I cobbled together the attached, which you could use as a data source to test the premise.