Good point, Pamela - about driving to collect plants.
I'm reluctant to add such places to the main downloadable list as that is so firmly meant to be for universal access, but it would be a very good idea to mention them here, or perhaps have separate within-country lists for. And as you know yourself there are nurseries in other countries such as the UK (and I know also Greece and Portugal) which don't export but which might be well worth visiting to collect plant, for people who live within driving distance.