The first place I would contact is the dealer where you bought the stove.
Also I don't know what part of Northern New Jersey you live in but we used to be able to go into the Worthington Forest in Sussex County and cut our own. We would get a state permit.
But the only one I'm aware of is the one provided in the link below. He's in Oak Ridge.
Also possibly landscapers would be selling firewood too. And if you're in the western portion of the state and near the Poconos, there's LOTS of firewood dealers there.

Here is a link that might be useful: Firewood

I'm in Morris county and I did ask Hearth and Home in Ledgewood and they weren't that helpful with the firewood side, which did surprise me.

I'm not far from Oak Ridge at all, my sister actually lives there...

Jay

I grew up in Kenvil! But I now live in the country.

how much wood are you looking for i have wood i could sell you all hard wood

I found the guys at Hearth and Home to be mean, condescending and nasty. Not to mention not very helpful at all. They act like they are being put-out. I've been in there about 5 times now and it is always the same. After some homework I found Hometown Hearth and Home in Whippany. Just bought a woodburning stove insert from them. Very nice guys !!!