Twelve Sky 1 is not coming back, mayn isn't going to host it, why would they? Why would they spend a million dollars for server rights, just so a thousand or so people can play? They aren't going to do it.
As for the private server files:
They are extremely old
We can not update them, why? because even if we did reverse engineer the zone servers, we would still need to make npc and monster spawn region files which isn't going to happen.
The max level for the files is 99 there isn't any support for anything past that, everything would have to be custom made which will not work.
The other stupid suggestion is : "Well lets just raise some money and buy the files from Alt1."
Ok, are you the production manager at a massive online gaming company? Nope
Do you have 100s or thousands of dollars to purchase the files? Nope
Can 300-1000 people raise 100s of thousands of dollars within themselves? Nope
If you do get the money will Alt1 one sell you the files? Nope, because you aren't a major game company.
If you do buy the files can you change and do anything you want? Nope because if you do Alt1 will *** rape you in court.
Your absolute best and most reasonable chance at getting twelve sky 1 back is......
stealing the live files from a current TS1 server. The best place to steal them from: the korean official server. Why? because they have NUMEROUS win 2k3 servers with MSterminal open (remote desktop).
You want the files go steal them, that is the only way you are getting TS1 server files.