I'm not in New York, but have some news that might be pertinent to New York people that liked Quisp.
I was shopping in a store called Grocery Outlet in Gresham, Oregon. Grocery Outlet carries surplus items that are not selling or have been discontinued elsewhere. I found some Quisp cereal. Loved it as a kid, so I bought a couple of boxes. Still love it.
Expiration date on boxes is May 2004.
I guess the news is that if Grocery Outlet in Oregon is selling it, sales in New York and PA are probably not going very well.