If you want to divvy up the bits to other minis,
Forgeworld do a whole squad with those helms.
There is also the one attached to Ulrik that is removable if you are veeerrrry careful with your knife.
There is on in the Ven dread kit that will fit with a bit of cutting and resculpting. Same goes for any number of wolf skulls in various
SW kits, which can be mated up with an actual helmet easy peasy.