Bandage Skirt

Vendor: Custodian of Whatnots – Agartha, next to the hub city portals.
Price: 75 Extant Third Age Slivers

Carapace of the Immaculate Machine

Vendor: Custodian of Whatnots (previously Custodian of Baubles) – Agartha, next to the hub city portals.
Price: Boots – 400 Extant Third Age Slivers & 35 Extant Third Age Fragments
Price: Chestguard – 500 Extant Third Age Slivers & 60 Extant Third Age Fragments
Price: Gauntlets – 350 Extant Third Age Slivers & 30 Extant Third Age Fragments
Price: Plated leggings – 300 Extant Third Age Slivers & 20 Extant Third Age Fragments

Achievement: Carapace of the Immaculate Machine – Helmet is rewarded by the Sentinel of Agartha achievement which requires you to complete all of the Whispering Tide event missions.

Thank you Rovena for the screenshots!

Military Pants with Metal Kneeguards

Vendor: Custodian of Baubles – Agartha, next to the hub city portals.
Price: 250 Extant Third Age Slivers & 10 Extant Third Age Fragments

Note: In Phase 3, the black version is no longer available on the vendor.