I just noticed Nauticam has updated its port chart for mirrorless housings to include some interesting new items, including:
N85 to N120 47mm Port Adaptor with Knob for M4/3 System
180mm Optical Glass Fisheye Port (for 7-14, 9-18, 12-35 & 12-40 lenses)
A series of extension rings with locks
They now include the Panasonic 12-32 lens in their chart.
(Actually, it may be that the port and extension rings aren't new, but are only new for the mirrorless housings due to the adapter?...I am not sure.)