Dungeon 16-10 I believe drops the fragments for them

in the home screen there is a buttton in the lower left called ninja soul. go there and hit decompose, choose the ninja spirit and it gives you good gems to put in the ninja soul screen

dungeon 20-10 drops 10 tails seal

90 loot sharingans, 20 itachi secret, an itachis hangover (can get by passing dungeon 17-6) and 10 dull sharingans