Found a server which is reasonably close to the original Dwarves vs Zombies by Rob Moran. One advantage of this server, is that it's online 24/7 and time between games is 1-2 mins. Disadvantage is that it's for premium accounts only.
IP: pvp.lihp.us:25565
Website: http://minecraft-mp.com/server-s11831 (http://minecraft-mp.com/server-s11831)
-Thanks!