Olea europaea ‘Eddy’s Winter Wonder’ Hardy Olive Tree, unlike most olive trees, is reportedly hardy to garden hardiness zone 6. It was originally discovered in Switzerland.
I WANT to grow this!!!

For 2018, I have found one possible source: specimentrees.com in Canada. They only sell wholesale, so you would have to contact your local nursery or landscaper to order one.
http://www.specimentrees.com/cart/productList.php?id=SOFRUIT&catName=Fruit
Specimen Trees Wholesale Nurseries Ltd.Pitt Meadows
Contact: Sharon Johnsen Howkins | Email Sharon Johnsen Howkins at inquiry@specimentrees.com
Phone: (604) 465-7122

Information on it is hard to find. Here’s what I have found so far:
https://plantdatabase.kpu.ca/plant/printableSummary/1476

https://bclna.com/plants/oleaceae/olea-europaea-eddys-winter-wonder/

Overview:
Self-fertile
Zone 6. (Some say zone 7)
Reportedly hardy to -9 degrees farenheit.
Slow growing. mature height 20 to 30 feet.
Requires full sun, well drained soil

Note: I found this image on Pinterest, on multiple boards. Original source unknown. If this photo is yours, please let me know and I will happily either remove it or give credit and link, whichever you prefer.