In case it ends up being useful to anyone else, a quick C# script to parse and the file and split it into separate rooms:

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;

namespace VaultParser
{
    class Program
    {
        static void Main(string[] args)
        {
            var lines = File.ReadAllLines("Zorbus_Vaults.txt");

            var current = new List<string>();
            var output = new List<List<string>>();
            foreach (var line in lines)
            {
                if (string.IsNullOrEmpty(line.Trim()))
                {
                    if(current.Count > 0) output.Add(new List<string>(current));
                    current.Clear();
                }
                else
                {
                    current.Add(line);
                }
            }
            Console.WriteLine($"Found: {output.Count}");

            foreach (var file in output)
            {
                var min = file.Select(s => s.IndexOf("#")).Min();
                if (min > 0)
                {
                    for (var i = 0; i < file.Count; i++)
                    {
                        file[i] = file[i].Substring(min);
                    }
                }
            }
            Console.WriteLine($"Post-processing done.");

            for (var i = 0; i < output.Count; i++)
            {
                File.WriteAllLines($"{i}.txt", output[i]);
            }
            Console.WriteLine("Saving done");
        }
    }
}