An uncle of mine who passed away many years ago had been in the produce business. He later supplemented his retirement income by supplying grapes to literally dozens of old customers making wine in northern New Jersey. This went on at least into the late 1970's. He contracted with someone in Calfornia and for a two-three week period sold the grapes by the case out of several reefers. I can't for the life of me recall where he did this, I'm thinking Paterson, NJ... but definitely off a siding someplace.
Now I'm curious, maybe a relative has more information.