I finished chapter III of season 2 a few hours ago. I got the rewards except the “Strips and points” mount armor. I relogged several times, nothing happened. The mount armor is nowhere to be found, neither in inventory nor at the stable master.
Same 
i complete it yesterday and its still missing
Same no mount armor for completion of Chapter 3
Am I late to the party? 
Same here: no mount, no barding!
It seems blizzard gets worst and worst. 3 days with this problem and no one fix it
Same. Completed the third tier yesterday and have no mount armor!
Same here, still no armor two days later.
Same here no armor available
Same here, tried making new season character to see if it showed up there but nope no mount armor.
mount and mount armor still missing… completet III and IV… hm…
Same here. No mount amor