Help required with 'We need guns, lots of guns!'

[wackajackattack]

Ok, I only need the Bloodcraver, Souldrinker, Tannar's Glory and the Shrieking Pilgrim to get this achievement (which frankly has been a pain in the ass so far), and then I will have all the Fable 3 achievements.
If anyone's willing to help me out, has some doubles they'd be willing to trade or something I'd be eternally grateful.
If there are any philanthropists (although not entirely necessary, to all you evil folk) out there my Gamertag is Wackajackattack.