Using Spydus in a Drupal library site?

Greetings all. I would like to build a library site for my school which has the ability to directly "crawl" the online library catalogue for books.

I've been looking at the library modules available for Drupal here http://drupalib.interoperating.info/library_modules but can't seem to find anything suitable. This is because the library uses Spydus, like this one

http://cwl.spydus.com/

Does anyone have any ideas on what can be done to achieve the same sort of "crawling" that library modules, like http://drupal.org/project/millennium can?

Thank you