Unused Customization Options and Other Ideas?

After watching all the cutscenes that feature Paul Demarco, I noticed that he has two pieces of armor that aren’t available for unlock (yet or at all). These are his forearms and his legs.

If these aren’t actually in the game I’m really disappointed that these weren’t included for player’s customization. I think they look great.

If someone has actually completed whatever challenge to have them appear (if this is the case) it would gladly appreciated if it was shared.
I also saw another set of forearm armor that I heard didn’t make the cut.

Also, what armors would people like to see return or be made in the future?