Me and my friend couldn't find one grilled sweet potatoes cart thing around in the entire city

Sweet potato carts are not common in the U.S. nowadays. But, by a strange coincidence, I came across this photo online today. I think it is AI, but it is set in New York City, in what appears to be the 1940's judging by the looks of the automobiles. People older than I am remember these kinds of carts in New York.

I grilled 2 this last weekend! Took awhile for the bbq to heat up and had to shovel a path to it, still worth it

I want one now