No, those ships haven't been modeled for SHIII. But actually, in the open-source subsim Danger from the Deep, several variants of the North Sands (or Fort) class freighter has been included - if you want to see a couple of shots I can post them for you, although the model is not available for this game. If someone was looking to build a new merchant for SHIII, this would be a good one to do, IMO, as it could represent any generic merchant of that size in addition to its specific class - more so than the ugly C2 and C3 anyway.
