The Vault, which contained all the PDFs from Hero Wars and HeroQuest 1, has disappeared from the Chaosium online shop. Could well be, that this happened in the context of the 'Stay In and Game' Warehouse Clearance Sale, but as far as I can say, this has never been announced officially. (I do not assume, that "While stocks last!" applies to PDF only articles 😉).
Or do I miss something?