You might also try this link:
http://www.lajollabridge.com/Software/ACBLmerge/ACBLmergeAbout.htm
the home page of ACBL merge.
It seems to produce all sorts of reports, but I am not sure if it does
so from ACBL Score files. I think it does.
The author seems to be an 'open source' kind of person so he may be
willing to share his code with you.
pgmer6809