The message
from "Jon" contains these words:

Can anyone tell me of a local (North Wales) or national (Mail order)
supplier of Escallonia Macrantha please? I have searched everywhere for
these without luck!
Any help would be appreciated!

Escallonia is not rock-hardy. If they aren't stocked in your local
GC's and sheds, it could be because they aren't quite hardy locally. The
NW coast should be fine; Snowdonia probably isn't. Do they grow in your
neighbourhood?

Janet.