I reached out to the mods. Heard nothing from them. Following that I begrudgingly reached out to Reddit admins, and explained that the page is still down with no word from the mods.
Reddit admins also could not get in touch with them, so after they offered me a chance to take over the page (which I declined, I don't have the time to solo mod a 19k page), they found someone else who has opened the page back up!
TL;DR: The main Reddit sub, r/FiestaST is back up and running.