Nearest Myceloid Colony

So, two of my players got afflicted with stage 2 purple pox in the fight against Xungu. Now, as per the description of the disease, they immediately seek out the nearest myceloid colony. I haaven't read the other books yet, so I don't know if there is another one inside the mindscape, but it would be much appreciated if someone could tell me :) Otherwise, I will just let them go south and constantly try to go through the mindscapes border