Wanted to provide an update. I've since moved my bald little society into a reptile terrarium, with a heating pad underneath to provide warmth:
I have paper towel laid down inside along with a food and water dish. Unfortunately, no new feathers have grown and I think it actually has less feathers now
The little guy/gal is very energetic, personable and also quite tame. I'm still trying to think of a good name, trying to avoid the obvious ones like Kojak, etc ;) I've thought about trying to rig something up inside a cage where it could maneuver around (ramps or something) but have not had much chance as we are in the middle of packing and trying to sell our home. At night, I take the little guy out and put him in the nestbox with the other societies and I can tell he is very thrilled and happy. He hops in and makes the little society mewing sort of chirp they make when hopping into a nest, sort of like "hey its me! knock knock". He will also excitedly click his beak in greeting, it is quite comical.
Will think of other options as I can but for now I just make sure he is warm and well fed and cleaned up after. Perhaps when it comes time for most babies' first molt, some may grow - we'll see.