Notice, the new 463 orange-grade items (true endgame items) were added with the last kTOS patch. As I mentioned in the item translation Pastebin, there was a high chance that the recipes would change (and they wouldn’t be copies of the purple 401 purple-grades). They did change. They require two of the Uranium ores, 15 of a new purple ore that looks like Ferinium (it’s not), and a large number of resources from two types of R8-grade enemies. Each orange grade item has it’s own required monster resources, and they aren’t all the same across every item.
This is my personal speculation, but it seems you use five-of-a-kind purple 401 recipes and two of the new Ferinium-look-a-like ores to create Paper Cubes, which may have the orange recipe within it. Kind of like crafting a Gacha Cube maybe?
