This could effectively replace the existing freighter cargo upgrades, but add some additional challenge to logistics.
Instead of delivering item(s) to a hub and the freighter picking up what it can for each trip, add an operator that collects the resource and only outputs when it collects the full amount--an operator at the other end would reverse the process.

Think of it in terms of modern shipping & handling: the manufacturer packs a pallet with their product, the pallet goes in a truck/train/ship (and generally) to a regional distribution center...