If your playing on a PC then you could try using the console, you can find out how to enable and us the console here:
StarWarsKnights.com - Knights of the Old Republic - Kotor TSL - The Sith Lords
Unfortunately I dont think 'giveitem' will work as I haven't been able to find the item's ID. Warp might be the best way to get around the problem, the area code for the underwater base is manm28aa.