https://forums.sinsofasolarempire.com/339832
includes a link to my post given by Harpo99999 and a map you can play in SINS that has the features described. View the map in notepad to see how the scenario templates are added. Harpo, do you have SINS 1.13; does "7DS Systems of War" play? I only have SINS 1.05 for 7DS 2.0 Final testing/modding.
Check the above link, I've included a link to a version of the map made compatible for SINS 1.13.