Hi, I am a creator of the models ripping tools from 2011's so answering the main question, yes it is original map, I would even not bother to recreate it manually. And of course it was possible even back in 2011 but nobody noticed that all needed is lying here around. Reboot is considerable but for now seems like I am the only one software developer capable of doing that. Some new IP owner is trying to mess with the game (for now he only announces so) but it is reasonable to expect a miserable effect. Topic of modding the original game (poorly written piece of software) is mostly exhausted.
One more sample, ahh demo version memories:
Catch up before volcano explodes!