sorry that i don’t know the real name of the mask.
i saw the mask and loved it. if anyone has one please let me know.
without any picture I doubt we can help you identify the mask you want 
Look up a guy on YouTube by the name of dean knight. He is selling his nag.
Go to Nag’s Facebook and look through his photos until you find the one that caught your eye. He posts a lot of photos of his masks and puts their names on them. That’ll be the easiest way to figure out which mask it is. You could also check the gallery on the site here, but it hasn’t been updated in a while
Be ready to make a dent in your bank account though, lol.