Well, if you make it a module and put it on CPAN, we can make it Perl wisdom to point said module out to others who ask. Otherwise, just realizing that your approach has as much to do with the plan as with the tools is wisdom in itself.

BTW, it's probably possible to write an ad hoc text extractor using heuristic rules and regular expressions to get close to what you want without building a proper tree. I'm not sure without trying if HTML::TreeBuilder or such would be really necessary, but my gut feeling is that it could help quite a bit.