Bercilak's Armour?
Its a heavy armor you can get from the twilight arbor token vendor.
You get the tokens by doing various paths that the dungeons offers.
As for medium armor with scales…….http://wiki.guildwars2.com/wiki/Emblazoned_armor
best I got
Chaos has it right – TA dungeon armour. There’s a vendor in Vigil Keep that sells it.
The total outfit costs something a little under 1400 tokens, and only if you’re really lucky will you find people willing to run through all three paths of that dungeon. Most are content to run U/U and F/F.
TA is also one of the few dungeons that doesn’t go by the normal “path” system (path 1, path 2, path 3, etc.).