I live in Florida so obviously can't help you this Sunday.
I've read you go thru various cemeteries in New York. I have a grandmother buried at Mt.Hebron, Flushing if you could ever look for that stone:
N.Y.Society: Knehin Stanislauer 5 10 f 33 Fannie Janofsky Hoffman. Her sister Rebecca Janofsky Hoffman is also buried there (yes Rebecaa married Phillip and Fannie passed.
Do you know anyone who does this in NJ?
Carole Hoffman Brewster