The Sith Infiltrator was Unique, meaning only one was ever added to the game, that I know of. There was never a datacard, and it could never be produced.
Last I heard of it was a rumour that someone flew it into a sun, so it may be that it was destroyed.
I can't confirm that, though.
____________"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."
Only fools and children dream of heroes.