Ceanataur Armor - missing the vambraces!!!!

I don't see this in the list, i've completed the whole thing but this.
How can i unlock this

(vambraces - is the one worn in the arms)

Ceanatuar braces
Defense:37.
resist modifiers:fire+1, water +2, Thunder-1 Ice -1

required items

Ceanataur Pincer-1
Ceanataur shell-2
Earth crystal-4
Carpenterbug-3

You get Pincers as a reward for breaking them off(both). You also have a chance to get one from rewrd if you capture the shogun Ceanataur.
You can get carpenterbugs from pokke farm.