A18 is not expected to be that different. Time constraints and the nature of some of the mods make modders skip a version, especially if the end of the current alpha is approaching. n2n1 does a lot of changes to edit the resources.assets file, which is slow, time consuming and a fickle process. With so many edits to a file that changes every single release, including point releases, it doesn't make sense to even start doing them until the alpha stabilizes. The same effort will have to be done for A18.
We did point you to the mod and author, and if you wanted a copy, I suggest reaching out to n2n1 directly and asking for a copy.
The Mod Launcher supports git and very few alternatives. One of the reasons is that the links don't expire, and don't need to be replaced. This allows people to enjoy older versions of the mods. Some modders have not moved over to the new hosting sites, and their links have expired.