Since there is no real mask for this, the easiest way to make it would be combining the following 3 items or, buying it premade
$11
Noverlife 10 Strands Dreadlock Extensions
$10
Half Face Skull Mask
$10
DECKY Face Mask
$65-130
Knight Boss Mask
It is available to buy just the mask, or the balaclava (which includes the hair)