Linda is one of my favorite characters in the Halo Universe. I already know that her armor Argus; I’d like to know what armor and visor colors she wears. Thanks! 
I don’t think any of the exact armours from any of the Spartan’s in the campaign are unlockable. Kind of like how the req version of Locke’s armour isn’t an exact copy of what Locke looked like in the story. I wear the Legendary VISR a lot because it looks like Master Chiefs to me, but the Chief’s looks “better” than mine does.
If that makes sense.
I know deciding on a gold visor can be difficult, please check out this post by MrMartini85 about visor colors I think what he’s on to is pretty cool! I personally use the Dynasty visor.