Are there any freight customers along the New Jersey Transit owned portion of the Raritan Valley Line which has passenger service?
Yes. There's a few left.
MA-20 serves the ones left of BROOK (Bound Brook) 3 days a week. they are:
-Dameo Trucking just west of Finderne Ave. Biggest customer on the line, and they have 2 tracks of overflow at Bound Brook on the old ramp.
-Steel transload that gets gondolas. Can't remember name
-Thermo Fisher Scientific just west of Raritan.
East of BROOK there's just one left done by MA2 roughly a few times a month at most:
-Injectron just west of Plainfield.