Stygian Necrolord and Stygian Armour set show skin

In the combination of the Stygian Necrolord Helmet and the Stygian Body Armour MTX there is skin on the neck of the character. Looks out of place and it shouldnt be there, makes the two MTX not match well. Is there a possibility of changing either the body armour or the helmet to not have these skin "triangles"?