This download includes a bunch of free to use maps and the original EO maps all tied together ready to be dropped into your server! https://archive.org/details/endless-online-original-maps-eoserv-user-created-maps
Here is the EO Rewind Server Build. This does not include the GFX files. You will need to replace the PUB and GFX files in the client folder with V28 or V29. https://archive.org/details/endless-rewind