there is this quest Mystic River in the game and I found all the things needed to craft the Vran armor.
the only problem is that I used the Vran armor enhancement on my other armor because i didnt know i could have used it to make a better one.
can i get the Vran armor enhancement back from my armor?
thanks for the help

It can also be purchased from Bras of Ban Ard - http://witcher.wikia.com/wiki/Vran_armor_enhancement

thank you.helped alot :D