For something like fireworks, which are manufactured in China and not by someone sitting on the side of the road, yes, Google works.

Why you would prefer buying something from a person standing in a parking lot instead of an actual store with "fireworks" in the name is beyond any of us.

Out of season, Phantom Fireworks is pretty much your only answer. Most other retailers don't want to waste the floor space selling something that most of their patrons will only buy one month out of the year.