Auspost eparcel integration with oscommerce

We need to integrate the eParcel (from Australia Post) with osCommerce. The eparcel server will require some kind of scraper/api to pass order information to the eparcel system. The eparcel system will then provide a 'label' which should be linked to the order within oscommerce. Then, when we print 'packing slips' via osc it should print the label provided by eParcel. We would prefer if you've actually completed an Australia Post Eparcel intergration with oscommerce in the past.