You can't re-claim any of these items from the Calamity Salvager, which is basically my biggest complain about this. Everyone else saying you should've kept the pieces anyway, are missing a point I think. Like the OP, I was male when I did the quest and I have no intention of changing my character back to male, EVER. Why would I have kept Snow's outfit if I could never wear it, and SE had said there was never going to be a gender trade in option, AND the event was never going to come back again? Making those items re-claimable off the NPC seems like an easier fix than allowing you to re-do the quests, I mean I can grab my freaking Valentine's Day gear off him so why not?