Howdy aspartame17. I might be able to help you out. I don't have time to take on your exact request but I'm working on several sets of free map tiles, such as the ones I have started in this thread. I could do a set for a dwarven city along with some tunnels, that you could use to construct your own battle maps. If that would work for you let me know and I'll put the subterranean set to the front of my list.