Sectors can be changed. I'd say look for maps that look like they could be the foundation for a good EIR level and then we can approach the creators about resectoring. It will take a while to go through all those, schultz, thank you for taking the time to post all the links!
Don't mention it man. I was searching for new maps back for the TLS, but lack of dev activity made it all kinda futile.
I hope you find some of them good enough to be tested for eirr.
I can then further the search, this one was kinda random.
My criteria for the above maps were based on the shape and dimensions of the map layout, and the detail evident by the pictures.
I generally had im mind to look for maps that were either open, or offer a tactical challenge while not being broken, at least to my eyes :p
As i said i tried to stay away from maps with bridges or large bodies of water, forcing actions into small areas of the map.
Anyway i hope it helps.