Thanks everyone! The latest Mondoid mentions that Blindcoder's Mapping Project will probably be updated next week. The Mondoid links a top-down map in standard NESW orientation and a copy of the map rotated 45 degrees to look closer to isometric. You could also check those out. (Thanks for the shoutout!)
I superimposed the thumbnail of the new eastern area onto the existing map. It's pretty rudimentary right now, but hopefully it'll help you gain your bearings while the interactive map gets updated. I also labeled a few points of interest that I've come across.