Allegedly this is it. Cover memo. The Dossier (pdf).
INFO on Ken K. https://substack.com/@kenklippenstein
https://en.wikipedia.org/wiki/Ken_Klippenstein
With prior work at THE NATION this man is liberally biased, if biased at all.
IMO - Crabgrass in scan reading does not see the item as unfair, or harmful to Vance, in comparison to things he's said in campaigning, or otherwise. It is worth a look.