the 4th Era Retexture Project was made to bring the Elder Scrolls Total War into the 4th era with new lore friendly(ish) units for each faction of the original mod for the new time period.
Both redguard factions are covered in this one and they get extra spicy body guards. Mostly just a recoloration.
where can we see the units?
There is a showcase video in the articles section
You've beat me to the punch on Redguards; only wish I could see them, though I will wait until my Vacation is over to see for myself.