Sivulliq

The Sivulliq was a prototype RK-720 Light Freighter designed and manufactured by the SoroSuub Corporation on Edic Bar, Genarius. The ship was stolen from the manufacturing plant and was eventually recovered two months later by heroes in the Cularin system. However, SoroSuub decided not to put the design into production and so gave the prototype back to the heroes who had rescued it. In their haste, SoroSuub engineers failed to remove a prototype cloaking device from the freighter.

Behind the scenes
The Sivulliq was given as a unique prize to one of the roleplayers at the Gen Con 2001 Living Force Interactive Blown Away. This was later described in an in-universe account in The Sivulliq Is Out There -- Somewhere.