Adding to that search option, make sure you aren’t in a tab, if you are, click on the tab to get out, helps make the search cover everythingResearching an item in Journey mode consumes it. Once you've researched an item, you can create infinite copies of it. I don't have Terraria open right now to check it, but I would expect the TV Head would be in a tab with other vanity armour. There's also a search function for finding items to duplicate. (Next time I have Terraria open, I'll check and advise where it is.)