I really like the Nomi Sunrider and Ulic Qel-Droma era of play, so I am planning a minor campaign plot in the Cron Drift. I need an old Supremacy Class Attack ship, (found here: http://swtor.wikia.com/wiki/Supremacy-class_attack_ship) and am really not great at statting them.
The ship had a Hyperdrive mishap during the ancient war due to an exploding sun caused by Exar Kun, and may or may not be recoverable depending on the actions of the players.

Just reskin a similar ship, like the Dreadnought: http://swrpg.viluppo.net/transportation/starships/1244/

That's not a bad idea.