Nice piece of art, and cool armor design indeed. And I think you could get something that would look close to this if you did a mash up of various assets. The left pauldron reminds me of one of the metal armor pauldrons of Fo4: https://i.imgur.com/WOqN1ki.png , the one from the middle picture.
The helmet looks like a german WWII helmet, so maybe you could use the helmet from this mod:
http://www.nexusmods.com/newvegas/mods/35081/?
As or the rest I'm kinda running out of ideas, he seems to wear a leather jacket underneath his accessories, I'm pretty sure there's several mods with a similar looking jacket. I think you should take a deep look into Dragbody's armor, you'll find lots of useful stuff that would help you recreate that armor/outfit. But you'll have to go through nifskope if you want to get as close as possible to that design (not sure if you had that in mind already or not).