Phyllis, Yacon is a root vegetable from the Andes. It is available in powder or liquid (syrup) form and is used as a sweetener. It's pricey, but I find a little goes a long way (tastes kind of like sorghum or light molasses). Yacon contains high amounts of fructooligosaccharides (FOS) (prebiotics).
Vitamineral Green has both probiotics and some prebiotics in it.
Vitamin Code multivitamins have probiotics.