Dear Nanjin,
What I was trying to point out - without having it in hand, just judging from the photos available here - is no question of customizing, I think it could easly be done by your team and realized in regular production.
The scarf really seems to be too rigid as can be seen on this pic.
View attachment 548389
The scarf is inflating his chest giving the slender Spock a somewhat stocky frame look.
I admire your work, Nanjin, and I hope that my observations do not harm you, they are merely intended to give some hints that might lead to some slight improvement - in case you agree, of course.