Plants delights Nursery located in central NC zone 7b says this about the orinoco:
PDN -- Musa 'Orinoco'
"This amazing banana is one of the most cold hardy of the edible fruiting bananas, commonly grown for fruit in the US Gulf Coast region. Musa 'Orinoco' amazes visitors with its nice fruit clusters in our Zone 7 garden. For us, a height of 10' is common, although M. 'Orinoco' can reach 21' in more hospitable climates. In the colder climates, cut the banana fruit stalk before the first frost, and keep it indoors in a bucket of water until the fruit ripens. In Zone 7, I recommend surrounding the trunks with a 3'-4' tall cage filled with leaves to preserve next year's fruiting stalks. Pot size: 2 qt. (1.892 L) "
They claim to be able to get fruit- I picked up some elsewhere (their prices are little high) and am going to give them a try next year in the zone 7/8 border.