You already have a Double-bladed saber if you searched Brejik's corpse. It is Bastilla's but you can use it too anytime
Dual sabers, you can get them everywhere, really just explore a little.
"I've barely eaten anything for many decades now. It feels like my stomach shriveled into my back........though i don't have a stomach or back because i'm a skeleton! Yohohohoho! SKULL JOKE!"
"My eyes have never seen such a pretty woman! But i'm a skeleton so my eyes don't see much."