Al Bhed compilation sphere...close enough
by the way, you can also get em for killing an original creation boss. It's either Catastrophe or Th'uban. (I'm not sure which.) They're not that important IMO. If you can kill Th'uban, you can get Trip OD weapons...much better than Double OD you get from the Underdog's secrets.
__________________
Fight, if there is something to fight for.
Never give in, or give up - but ALWAYS give.
Choose your battles wisely.
You only get one shot at life. Follow your heart.