Just wondering: Did anyone try to stat up the Misericord and/or the Bountiful Beast ?

The generic class type that's the misericord's hull can be found in BattleFleet Koronus. Though you'd have to guess at what it actually carries, that's not really to hard to figure out based on its descriptions in Dark Heresy.

As for the Bountiful Beast I unfortunately cannot remember or haven't seen where it's mentioned in Dark Heresy so can't say anything on it.