I think some 50 pages back or something, someone mentioned holding L + R when booting up MHX or Gen with JK Save Manager, and you can find it and export it from there. Maybe give that a try?
Here's something totally off subject kind of, but if you wanted 1 of each fully upgraded weapon, you'd need 1,247 slots. Just a heads up for anyone attempting to do it.
Weird, I only had about 4 or 5 unlocked before I used to quest completer but now I have all of them. By weird I mean it would be weird if he still only had 2.
Ah, some of the items like Ultimate Mask must still be unlocked through Villager Requests. That one unlocks from doing the quests from Cha-Cha and Kayamba. Even if you have the parts you have to do those quests.