Okay, provide me a plausible source of $USD funds.
That's not how it works. You are the one making the claim here, not me. And it is clearly a claim that you cannot back up.
From a fleeing politico no less.......
Who beside the US Government would be able to move that volume of (cough cough) $USD?
Going out on a limb for a moment by assuming this story is true (with zero evidence), and considering that Kotvytsky has been a businessman in Ukraine for quite some time, it would be highly probable that his business profits could be the source of this alleged (and unproven) discovery.
Now the facts. His wife Anastasia Kotvitskaya was eight month pregnant at the time. Yet in the photos accompanying this story, she shows no sign of pregnancy. How did she pull that one off? Also, she is caught violating Hungarian law, yet the Hungarian government gives her a do-over, allows her to declare the money before giving it all back to her? Yeah, right. And lastly, there is zero follow-up. Not a single mention of this since this story 'broke' over three months ago.
So where does that leave us? Not only can you not prove that US taxpayer dollars were involved, you can't even prove that this even happened.