Well, perhaps you could post an image or at least a link to what you are looking for. I see Sauron's armor only in my minds eye, as I am more of a reader of Tolkien than a gamer or movie watcher (yes, I have watched the movies).
The Ringwraiths were differently suited, particularly the Witch King of Angmar (the head ringwraith). He alone of the wraiths still wore a crown.
I think that someone would be interested, but a little more specificity on your part would get the ball rolling better