[Advice wanted] Garden State Parkway coin toll plaza violation

I'm a temporary visitor to NJ (and indeed the US), so I'm not used to some of the specifics of travelling in the area, including the toll plazas.

I was driving today through the Eatontown North toll plaza coming on to Garden State Parkway. I don't have EZPass as I'm not permanent here, and I didn't realise it was going to be coin only - I had some bills but not $2.10 in coins. I had no option but to drive through without paying.

I understand that it takes a picture of your license plate and sends you a mail with the toll to pay plus extra fees or whatever. However, to add extra complication, I was driving a ZipCar so it's obviously not registered to me.

So my question is - is there some way I can go online, or number I can call, and provide the reg to pay the toll now? I have no idea how it will work otherwise with ZipCar etc, and just want to avoid the possibility of some hefty fine.