It seems these are no longer obtainable? Or are they? Frustrating if this is the case. I went to the supposed Repeater Shank location on Venus (patrol) and there were no Shanks, only Vex. It makes no sense to me that new players (or new grimoire hunters) should be locked out of getting certain cards just because a new DLC/update comes out.
http://db.destinytracker.com/grimoire/enemies/fallen-hunted/wanted-high-servitor
http://db.destinytracker.com/grimoire/enemies/fallen-hunted/wanted-repeater-shank
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Just go to the abandoned quest kiosk and get the HoW quest and complete it. Simple