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not the season here..
There is more than one season a year as trees fruit multiple times and different varieties fruit at different times.
I think you contact James Cheng. (search abiu)He sold last year, and live in Taiwan.
There are good abiu in Brazil, Florida, Hawaii and Australia. Some of the good Australian varieties are z4,z3,e4,gray,inca gold and t35.Use the search function to see past threads on abius.
There is a seedling on ebay http://www.ebay.co.uk/itm/Abiu-Pouteria-Caimito-Tree-Starter-Plant-Seedling-8-12-FROM-HAWAII-/162545486478?hash=item25d8774a8e:g:vrkAAOSwJ7RYUE0P