I don't even think he's done any others (I haven't seen any), which is most likely because it was rather time consuming to do it how he did it the first time. To be honest, the map's quite horrible (not to mention an eyesore)... with the extent of time it would have taken (and manually!!) it really wouldn't be worth it to do any others like that, so I don't blame him.
You could find a better source of new maps (in mgame's format even -- although slightly different) from Repent Online/Legend of Ares.
I vaguely remember seeing one that would better suit the snow war, even. You might try there.