Hi GothicVampire, thank you for the update on your broken bones. I’m glad it has not occured since and hope it does not return. However, if it does, please let me know.
The crafting menu has a issue in it at the moment that the team are working on which can prevent the story items from unlocking. However, yourself or your cousin should be able to craft the items via the quick crafting menu. A number of players have reported success this way but this may be more successful if done at the boss area or directly after killing a boss.
There is a Known Issues post on it here: [Known Issue][PS4/XB1] Crafting Menu Reset / Story Items Locked
If you are unable to craft the item in question via the quick crafting menu, please let me know and I’ll update my report for the team.