Two cents for you. Almost every single off-the-shelf bag you find will be a compromise, and custom sacs are usually not MUCH more expensive.
I'm not familiar with your layout, but as an example, I might normally go with a pair of v-drive locker sacks in my v-drive locker and get 800 pounds under the hatch. Or...custom rectangular sacks that'd hold 1300 in the same compartments. Doubt there's be $50 difference between the custom set and a new off-the-shelf set despite 60% more capacity.
Lot of guys here have done custom sacks. If you're interested, just search around.