Lanzones?

I was just perusing The Scent of Green Bananas, and came across this:

Name That Fruit!: Lanzones (Scent of Green Bananas)

I have never heard of these things, but I'm intrigued. Anybody know if these are available in the U.S.? Meliaceae is the mahogany family...

TSOGB is basically a food blog, but so fruit intensive that I read it semi-routinely, which is saying something because my tolerance for food blogs wears out pretty fast.