I've only seen them in San Francisco. It's an Asian fruit.
Author's response
I went to San Francisco when I was seven! I remember the plane ride and going to see a bunch of seals. Or sea lions. And I sort of vaguely remember Alcatraz and meeting my cousin Tyler who had a ton of acne at the time but I guess it cleared up because he managed to get a wife and a dog and now his wife's gonna have a baby.
But I don't remember Duran Duran fruit.
(Hell yeah spell corrector you go.)