I'm just posting a link to this website, as this is a newish exotic nursery in Beeston Nottingham UK. They do mail order, and have lots more that isn't on the website so if you are looking for something, they might just have it.
We bought a Smokebush, a Black Elder and a Amelanchier from him - and I'll be using him again at some point....
So, here's the website link. http://www.plantrevelations.co.uk/
The plants were of a very good quality indeed. Hence posting this link.