These seem rare indeed. Post here when you get one. Post how you got it (cache, drop, etc...), difficulty setting (Hard/Challenge), and platform. I wish I could kick it off, but I have not received any.
SKULL GLOVE - LZ random mob WT5
Skulls gloves came from Chains in LZ
x2 Skull Gloves from LZ doing daily free bosses WT 5, friend has the Barrett piece from Lexington doing missions Challenging WT 5.
Skulls MC Gloves x 2 - Roaming boss LZ kills CrossBow Kneepads x 1 - Roaming boss LZ kills 256 Caduceus and 256 Tenebrae - same as above. I've run Lex event 100+ times and no chest. Giving up until it drops on ps4 where I will actually make use of the chest.