In Hawaii, I stopped at a roadside fruit stand and they were using a 'Champion' brand juicer to make custom sorbets. They would pre-freeze the fruits and according to what you wanted, take out the desired frozen product and push it through the juicer. No sugar, very healthy, just frozen fruit finely smashed smooth and creamy, exactly like sorbet. The unique thing was that you could have banana, pineapple, mango, passionfruit, eggfruit, or any combination in any desired proportion. This only takes a minute for the product to come out, change the 'recipe', and a new product was produced.
The machine is actually a juice extractor, so seeded fruits can be juiced, frozen and the pulp is then ready to make sorbet at any time.
To make sorbet just remove the screen which normally separates the pulp from juice and the sorbet comes out of the pulp discharge.
Banana seemed to be one of the key ingredients, it makes the product creamy. The concept worked well, and the stand was busy, helped the farm make a value-added product and eliminated spoilage or the need to sell quickly. They had a freezer full of fruit ready to go at all times.
I plan to get one and hire a young person to run such a stand for me when my trees begin bearing more than I can eat.
Here is a review:
http://www.all-about-juicing.com/Champion-Juicer.html