I wish I could help. Being a Komui cosplayer and all, but I only use my realy hair for Komui since it's the right lenght and I always dye it black/blue....sorry. Have you tried asking a commissioner to help you find the right wig?
Welcomed my new muse to the world on Jan 3rd 2014 at 3:18am.
From now on I believe all of my cosplays will involve this little wonder that I helped create.