I have submitted a new screenshot - the AC is now 24.
The recipie for this, and pretty much all other known tradeskill recipies can be found at www.eqtraders.com - This is in the Humans - Freeport cultural section.
You need to find a 190+ skilled Human Smith to make this armor.
They are a very pale green color - There is a picture posted at www.freewebs.com/cultural2 - I have submitted the same picture for the fashion table here too ;)