Is there anywhere else to get wraith officer badge ?

[yukino23]

with coins possibly.

[Agatio]

You can buy wedding wine from God's giving and then exchange to wedding candies at Eldest Matchmaker. 
Or check commission shop for rep items.

[yukino23]

thanks by any chance do you know where i can find this gear ?

[Agatio]

Its lvl 145 Nirvana gear, available also as armor fashion.

[yukino23]

from which fashion npc?

in archo has some nirvana armor but they look different than the one from the pic

[Angelica]

thanks by any chance do you know where i can find this gear ?

That's the r8 gear of psychics. It's currently unavailable to any other class.