I have "all the guns" for dupe, but they aren't all the best possible versions. Doubt you'd even want them.
If you do happen to find a kind soul to dup all the weapons, remember that the storage capacity for the vault is 27. Going beyond that maximum is an exploit and goes against the spirit of the game. 27. No more, no less
Crazy? Crazy with low prices on Wind Brahmin. You buy one!!