The Stealth Suit MK2 is found in the X-13 Research Facility and is one of the best outfits for stealth-focused builds in all of Fallout: New Vegas. It was
Stealth Suit - New Vegas at Fallout 4 Nexus - Mods and community
Gray Fox Stealth Suit [Fallout: New Vegas] [Mods]
Stealth Suit Mk II - Independent Fallout Wiki
Stealth suit Mk II, Fallout Wiki
Fallout:NV Old World Blues-Stealth Suit Mk2
Fallout: New Vegas - GamerZenith
Old World Blues 7: X-13 & The Stealth Suit Mk II - Fallout New
Shifting Shadows - 2k Assassin and Stealth Suit Retextures at
Stealth Suit Mk II (perk), Fallout Wiki
Stealth suit Mk II, Fallout Wiki
Fallout: New Vegas - GamerZenith