Buy them on a villain and unlock them, or get them as random drops in content. You won't know when it's offered as a drop though since the devs give the unattuned drops stupid names instead of showing the style of the piece.
You can buy them in the House of Legends in one of the archive vendors. I want to say it's Ursa but could be misremembering.
Shameless plug. Let's Play "What's in that Scaling Gear Box?" | DC Universe Online Forums (daybreakgames.com) It's far from extensive at the moment, so any help adding to the list would be most welcome.
My mistake. I confused it with Parademon Sentry. It's probably like the Steppenwolf set and reserved for gear drops that are coming.
I bought a few pieces of the Shock-trooper style from the Vending Unit 22 in the HoD, but I'm not that concerned about it right. Still chasing after those mythical pets people speak of in those raids, I'm not completely convinced they exist xD
Will this include styles like Snake, Runes of the Norsemen, etc. All those old styles are missing like ONE piece and have been for years, and I would GLADLY pay source marks to finish those out.
1. Create a VILLAIN character, or use one that you already have! 2. Go to the Hall of Doom. 3. Go down into the basement/lowest level and find Vendor 22. 4. BUY the style pieces you need for 70 Source Marks + whatever the in-game cash is that's asked for. 5. Use Style Unlocking to unlock the style set on your Hero!