DUHHHHH!!!!!
I should just buy a copy of Shrapnel's very own homebrewn DUNGEON ODYSSEY game, and start from there! It's pretty close to being a roguelike... if you discount the realtime factor, but then maybe it's moddable to make it turn-based or at least pauseable realtime like SE5 is supposed to be, I really haven't looked into it much yet
(is "homebrewn" even a WORD?
)