Students often search for the version because physical copies are sometimes hard to find outside Indonesia, or they need a digital backup for studying on their phone or laptop.
You can find digital copies and summaries of the Gontor-specific version through these repositories: Direct PDF: Durusul Lughah Jilid II on Google Drive. Alternative Link: Another version is available on Google Drive Summary & Guides: durusul lughah jilid 2 gontor pdf