I have gotten them - rarely - at Ranch 99 (or is 99 Ranch?) in Daly City, usually in Sept-Oct if I remember. They were expensive, around $1-2 each, and a little mealy. Reminiscent of but certainly not an exact match for the mangosteen we know and love.

Ahh, I have memories of relaxing Balinese mornings on a hotel room balcony, a bag of fruits from the local market at my feet and a book in my hands, chin dripping with various juices - mango, mangosteen, rambutan, snakeskin fruit, papaya and most certainly (in Bali at least), PASSION FRUIT.