Yes, i get 1-2 every time i kill a few, like 20-50 max at a time, just to try my luck for the jaguar glove to complete my set, but not really forcing it as it has minimal chances anyway.
So its drops, but peoples probably not hunting them much out of the daily 50-100.
They are in pvp area, so have to be careful with autofire.
Have big agro range, and electric dmg that not many have protection against.
So peoples probably just have very small stack's that not really worth to posting to AH.
I have a few pc in storage, you can buy them if you find me online tonight.