Here’s a vendor out of South-Central Texas with 3 gallon (qty of 1) Nocellara del Belice for sale: http://www.txovsupply.com/olive-trees-planting.html
Sadly, this variety gets too big for my purposes. I may plant a Koroneiki come bare root season. DWN offers cheap little olive trees at most of the independent nurseries here locally. The selections are limited to what they show on their website.