The quill is sadly specific, it only copies spells from scrolls.
Dedicated wrights craft magic items for you, you just spend an hour to get it started and come back when the item is finished. You could prepare the spell, have a wright craft the scroll, then use the quill on it, but at that point you're acquiring a dedicated wright, a relic, spending a feat or 2, and then spending xp and gold on each spell, just to save time on scribing. If you got the spells free from the relic it isn't as bad, I guess. Seems kind of like a Rube Goldberg solution to the problem, but then maybe your DM likes complicated solutions that give a wizard access to every possible wizard spell as a side effect.
Dedicated Wright is in ECS under homunculus, it and the quill are both handy even if you don't use them for copying newly acquired spells.