I too have been looking for the “Royal Blue” faceplate since before last 11.11. They are nowhere to be found.
Sure, plenty of listing photos SHOW the all blue faceplate. But when you try and order it there is no option for it. Instead, every listing has the “Glare blue“ color one instead (which came later and is different):
Basically, KZ made a very limited run of 100 Royal Blue ZS10 Pro and 100 Royal Blue ZSN Pro.
I should have bought them the second they came out. They apparently both sold out within a short time