Wings at War Khalkhin Gol Terrain Mat

I've been looking for a terrain cloth or mat to use for a Wings at War Khalkhin Gol / Nonomhan project for ages, and I think I may have found what I'm looking for. This mat is PVC, which is cheaper than cloth but not as easy to store or fold. That isn't a big deal as otherwise it's pretty much what I'm after, especially as it has a river bisecting the mat which could be the Nonomham or Khalkha river. I've asked if it can be made as a 6 x 4 mat, as it's only 3 x 3, so I'll wait and see what the supplier comes up with.