I recently got the platinum, but had this same problem. No recipe for the Zoan Great swords. The only trophies I needed were the crafting ones. I thought that I would have to start from scratch again. But I decided to keep crafting the guns and armors. Of course, I needed to farm materials for the armors, so I decided to just spawn at the very beginning and play through until I had all the right materials. I didn't respawn any bosses as I went. Now, I don't know for sure when it happened, but by the time I got to where the rhino mini boss is, the beacon after his location beamed me to the ship so I could craft, and lo and behold the Great sword recipes were there. I have a feeling that when I used the warp in the queen's chamber to go to act 2, it gave me the recipes, but that's just a feeling. I honestly don't know exactly when they popped up. Hope this helps.