I've just noticed how similar Ap'lek's mask is to the Sith Warrior Adraas one from SWTOR. Probably a coincidence, but it would be cool if Ap'lek repaired and wore an old artifact. :
Sith Inquisitor Mask 3d digital download 3D model 3D printable | CGTrader
Sith Mask: 6 Nightmarish Masks from the Dark Side - SaberSourcing
SWTOR Sith Hermit's Armor
Star Wars: Old Republic Sith Acolyte Mask Cosplay Accessory Prop
Sith mask (Custom version) - CRFactory
Sith torture mask | Wookieepedia | Fandom
959627 Sith, mask, Tsaber, Kylo Ren, lightsaber, Star Wars - Rare Gallery HD Wallpapers
Chuk Wojtkiewicz - Sith Acolyte Masks
3D Printable SITH MASK by The Hidden Fortress
3D file Darth Malgus Sith Face Mask | Legacy of the Sith Variant | Includes Unique Fastening Design | By Collins Creations 3D・Model to download and 3D print・Cults