Today I found the Chariot Romero Hearse spawn at the parking lot at the Rockford Hills cemetery church. You can easily take it, modify it and store it as your own.
The chapel parking lot is marked with a red dot.
How the first one is parked at the parking lot.
The other two spawn parked like this. The first one in the picture above is the one behind the bush.
This was taken during the night in-game time.
I've read so many comments here and on youtube how it doesn't spawn online and since I found these today I thought i'd share it with the community.
So yeah, you no longer need to find a modder to have this online. Enjoy,
(Edited to add a better map image)