Chaos OT, Deathzot, RoA and others were all given to various people. Some of those are still hosted and have been updated for a long time by them. At this point I would think all the originals are gone forever. Though making servers like those is very possible with some time and work. Usually it would take 3 to 6 months of full time, 50 hrs a week or so to generate one. There are several systematic steps to do one quickly but if you ever try it just remember you need to work from the ground up with items/spells and vocations.