Don't have any.
I was surprised too, but would the Rebbe bidavka refuse an umbrella that a little girl offered him from his car to 770? And that moment apparently changed the girls life forever. Not the craziest story. But agree, it's sus
I mentioned this at my Shabbos table and a name and date (at least year) did surface. Apparently it is mentioned in diaries of 5743 and the girl was one of Tuvia Peles' ע"ה daughters.
If anyone cares to take the time to find the original story and post it, it would be appreciated.