Good news: if you check the section about JimbobJeffers' first Minecraft server in the first post you can see that I have discovered a download link to an older version (well, it's old either way^^) of the Creative mode map.
I made some screenshots (I uploaded JPGs since some of the original PNG files would have been to big). I made the screenshots in Minecraft 1.16.3 (optical enhancements: OptiFine with Sildur's Vibrant Shaders) and here are some examples:
1. Build Wars Arena Inside
2. Build Wars Arena Entrance + some of the outside parts (I remember some plots of the city being settled, but this is an earlier version)
3. RRU Temple (?) - all hail RRU I guess^^ (Update: it's a hub with (now defunct) portals to the Void, LEGO Island and the Build Wars arena)
4. Funky World Generation - what can go wrong when loading a six or seven year old world?^^
5. Hotel at the Void (Noname City's Inn) - that building is full of redstone mechanisms
6. Pool in Noname City's Inn (there are other rooms as well obviously)
7. LEGO Island - you can change bricks to blocks! (I have also found a texture pack that's intended for this island in this post).
I hope you enjoyed those examples of rediscovered RRU (Minecraft) history. I try to add stuff to the first post of this thread as well (like a new example screenshot for one server). I also added a note/request to the top of the first post: if you have an old RRU Minecraft server world save/backup: please tell me about it (downloads are appreciated)!