Strangely enough most of these can be expressed through actual things from the Calaxis Sector if you're willing to rework it.
However before I ramble about that my answer would be, a mind wiped adpet starts using his own beurocratic fortitude to skrew over the Inquisition, why? He was almost an inquisitor once, failing earned him a mind wipe, and now it's breaking down because he's so envious of them.
Pride: Someone working with the named Eldar from Creatures Anathema, that guy is way too prideful of himself.
Wrath: The killing room, or pilgrims of hayte from Disciples.
Gluttony: Dusk has a cannibal cult dedicated to a powerful warp entity, they're also space pirate raiders out in the Kronus expanse. Not many details anywhere, Dusk is described in Inquisitor's Handbook, and their God is described in Dead Stars a Haarlock adventure.
Sloth: I'd take it a different route and demonstrate to the acolyte the failings of the noble ruling class. Somewhere like Malfi, where they're too busy infighting to get any work done. If you want divinatory though there's always the Menagerie who somehow divines where to go and spread their mad King's influence. Sloth is also one of Slaneesh's main dealings as well next to pain and pleasure. Menagerie is in Disciples
Lust: Lady of the Voids (space sirens) or the Ruination of Imperfect Beauty (could work in your violin thing as well.) Creatures Anathema both.
Greed: Plenty, Amaranthine Syndicate, Brotherhood of the Horned Darkness (Disciples), more interesting might be the predator's of the starry order (creatures) theire space hound daemons that kill those who know about an ancient pact a xeno specie made with the warp for power, that whole "It's not even your greed that kills you" thing. They're in creatures anathema.
Envy: Already suggested. Maybe someone is dressing up like Commissar Cain and executing "heretics" like he sees in the holovids. Makes for a lighter adventure, or darker if he starts executing the noble classes as well.
Truth: Man, there's so much messed up stuff you could do with actual truth. Either through the acolytes actively supressing it, or them being hunted by a kill team about all the things they know about now from their adventures and maybe having to choose to have it wiped from their minds. I wouldn't have an actual enemy for this one personally, it kind of takes away from the message. Unless you're going for a suppression tactic then you need something to supress. Maybe an intelligent occular device that tells people exactly what they want to know in the exact worst way possible, however it seems the easiest. Like someone asks for a million thrones, the thing tells them how to invest, but these investments spread the influence of cults all around the sector and doom and underhive to starvation or something.