The Astak EZReader, aka
Hanlin v3 (aka BeBook, LBook, ECO Reader and a bunch of others) doesn't really have a modern counterpart I don't think. I'm not even sure if the manufacturer, Tianjin Jinke Electronics, is even around anymore. I'd guess a third party reader from someone like PocketBook would probably be closest (depending on what functionality you're actually looking for) or maybe an Android based reader you can install apps on like something from Onyx.