How about larger transports which can carry 10k or 100K units... I've seen some NPC's i think which have
30,000 food or water.... stuff.. they sometimes block the jumpgates, trying to dock.
But make them horribly slow and turn like 1 minute to turn around or something...
These can then be used for intra system trading only, guess no one would dare to take them out of the system... and can probably use escorts to, can be used for specific RP events also...
<span style="font-family:Century Gothic">Spec - Independent Trader</span> Small Transport - Hauling without earning
Current Status: Inactive - Too Much Work and Travel