Hi Samuel,
I hadn't heard of this particular cultivar so I did some digging to find out more. According to the
Missouri Botanical Garden it is also called Myrobalan plum, and it is
native to western Asia and the Caucasus. They also say it produces fruit that is relatively tasteless AND it is not used as an ornamental tree but more as a general landscape plant where a small tree is useful. I suspect it would be good for birds, however, as it is a cherry plum and the one we have (not this cultivar as far as I know) is swarmed by birds every year. It is also susceptible to a lot of disease and insects. Just so you know. If you still want it though, I discovered that the Missouri Botanical Garden has a specimen in their Japanese garden that they acquired back in 2007 from this nursery ...
Crabapple Cove Nursery
6961 Telegraph Road
St. Louis, MO
63129-5223
(314) 846-4021
I don't know if this nursery is still in business, but a quick call
should tell you that and let you know if they have a specimen available. If not, maybe you could get some seed from the one in the Missouri Botanical Garden collection. Hope that helps!