Sworn Statement, how to get?

Looking through the Wiki all I can find are, well, unreliable ways of acquiring Sworn Statements. I was wondering if any of you knew how to get a hold of some rather quickly?

If you’ve been to Port Carnelian and had a successful term there you can acquire 3 Sworn Statements at the end of the Foreign Office cycle through The Value of Good Names.

Ah. It looked like something that I could do only once. Well, I’ll try that then. Thanks!

If you have done Empress’s Shadow you can get some at the end of the carousel regularly, along with refilling your deck. That is not vanilla, though.

But its card dependent.

Doesn’t Jenny’s school award them? And so do some professions, so that’s no good if you’re in a rush.