Is the larger map that was being sold at Gen Con available any other way? That was the one thing for Grimslingers I didn't buy and am kicking myself for it now.
It might be further down the line. GBG has told me though that playmats aren't lucrative at all though, so they might not. I'll ask, and if they have no intention of selling them I might give the file out for free and folks can order their own from whatever store they want.