The SAC 3 is carried by SFr Dis.
FS2 Tech Room Description
The SAC 3 is the most common Shivan cargo container found thus far. Its thin plating is barely enough to maintain the interior atmospheric integrity against the vacuum of space. As no additional effort was made to armor these containers against attack, it is assumed that only items of low value or importance are carried within. Nevertheless, standing orders are to capture these containers at every opportunity, unless mission orders specifically dictate otherwise.