Re-Using the Quasar hull

I'm not familiar with the Quasar. It was introduced on which book ? It might be one that I don't own.
Thanks. I think I don't have the right QLI book, I just found a reference to the Quasar, not the full ship. I found the MgT2 one after rereading the book. I guess i missed the onboard Type-S.
I believe it's designated the "Qasar" class in T20 Scout Cruiser, after its Luriani designer.