HI! You’ve found the right person. I’ve done this before!
My name is Angelo Carreon and I am an award-winning cosplayer from the Philippines. I have cosplayed as an Akatsuki member before, particularly Zetsu (yes, complete with the plant head; black and white face paint; and sprayable Green hair color) and Itachi. I even used Birkenstocks for their sandals hahaha. If you want the best Akatsuki robe made for you, hire someone who clearly knows what he’s doing, and has been through the experience himself! :)
Thank you for future correspondence. :)