How can you do the Masquerade Quest

[nottheguywhotookyour2cent]

Not a single Cuman had a Captain Mask and they dont seem to respawn.

[vine]

There are 3 types of cuman helmets with covered face, it does not require only the captain masks. Also game points out 3 cuman camps around where i personally had enough after second camp. Not counting many helmets looted earlier from fights. Which i did not keep yea. If that's not enough then go to Skalitz or forests around there, those guys are always there.