It quite likely came from a movie vehicle rental specialist.
I don't have a hope of tracking down the actual company, but vehicles used in filming are known as 'action vehicles' [possibly also 'picture vehicles' in the US] & a search for companies supplying them around NYC came up with this list - Picture Vehicles / Cars (NY 411)
Vehicles seen in movies and TV are quite often 'planted' there by the production, depending on how important placement is to the scene. In many scenes, every vehicle you see will have been rented specifically, or brought by each driver hired as supporting artist for the day.
They often get to drive them all no more than a few yards before someone shouts 'Cut. Reset.' & everybody carefully reverses back to their start point to go again for another take.
Official or liveried vehicles used in filming are very likely to be completely 'real' in all but identification numbers. Most often they are used vehicles bought from the relevant authorities and keep all the original decals/signage etc. though with advertising or official identification changed. Brand new vehicles can be purchased from the same coach-builders as the real thing too. They're the best people to get the details right. It's more expensive to use a movie vehicle supplier to do this, though if it's going to be a 'hero' vehicle then that's often done too. For instance a car chase vehicle will have several versions built - pristine, beaten up, air-rams built in for jumps, flips etc.
Just for fun - this is a gif [very small to make it uploadable] of the first ever scene I worked on in the film industry. Everything you can see, right to the very back of shot, is co-ordinated. Every person, every vehicle. This was a huge filming day and being Bond, as much as possible is 'real' not CGI. There are close to 1,000 people in this shot.
Late edit - again just for fun - I'd forgotten I still had this…
By equal token, my own car has been in several movies, though usually you'd never get to see the number plate for ready identification, which makes it like a million other cars.
This is a composite I made from my location pass on No Time to Die and a photo papped by a guy who had access to one of the buildings inside the closed-off zone, so no-one could touch him. It appeared in a national paper at the time [Daily Mail].
Mine is the second Merc back.
Unfortunately, as is often the case, the scene cut just before I came into shot, so this is all we see in the final edit… not from the same take, obviously, they changed the timings several times.
The 'main' Merc was driven by stunts not the owner, who sat in the passenger seat all day, because they had some very tight timings in some versions of the shot - which weren't used in the end.
Regarding my earlier comment about 'several vehicles', the Aston you can see just left of frame - they had two of those available for the day, identical down to the number plates. Famously, re-creations of the V8 used in The Living Daylights.