1) Solution of sewn type replacement to seamless type was failed due to the process around middle oblong hole. Yes.
2) Seamless type has limited color matching with obsoleted. Yes.
3) Noelia would find solution of 32 units by using double arti.backrest instead. Due to color Granite it is sewn and sewn can only be used for Double articulating headrest.
4) Noelia would propose color matching of 32 units. We do not know what color RSU want.
5) Two possible solution are
5.1) Replace by double arti backrest with new color of sewn upholstery.
5.2) DS keep stock of obsoleted seamless type color Yes for 20 years.
I have to start over again with RSU for this result and not sure if Dr.Suchada would accept double arti backrest or not. Also I do not know if adec can give free of charge or RSU has to buy the headrest mechanism as it is USD 855 retail.