I've not read anything specific about such a mount - given that it was mounted ashore only in RL I'm not sure such a thing would have been necessary?
Navweaps.com claims there to be efforts to navalize the gun. I'm just wondering if you came across any truth to that claim......
I can see if I can fit into into the 105mm C/38 mount without it looking daft, but it'd be AU only (and quite possibly wrong!)
Interesting idea......