And, with a flash of inspiration, here it is!
https://www.subsim.com/radioroom/dow...o=file&id=5951
This was actually a cool map to make - HUGE exercise areas, plenty of ocean and the Marianas Trench and Challenger Deep as well (a little over 35,000 feet on the DW map!)
Sadly, the Farallon de Medinilla bombing and naval gunfire range (the donut on the map) wasn't above sea level), maybe the sparsely populated Anatahan Island will do as a substitute?
It's in the Downloads Section now.
Cheers,
Stew