Quote Originally Posted by Tavrobel
Quote Originally Posted by crazybayman
Buy it from Wantz. He's in Macalania Woods South, near the Thunder Plains.

They cost 100,000 gil each purchase, in addition.

Alternatively, you can fight certain Omega Ruins and Monster Arena Monsters that will randomly drop them.
yep. Although good luck in waiting for monsters to randomly drop one for each character.....or even the one you want for that matter.

100,000 gil isn't that big a deal by the end of the game. You can make that back easily by even selling off some of the useless weapons & armour you have accumulated.