I don't know much about shipments to Europe, but I would think you could get a new pot rush shipped in less than two weeks. Any competent electric guitar repair person, or electronics person, should be able to easily swap out a pot. It's easy to do it yourself if you have any experience with a soldering iron. As they say, it ain't rocket science (though other aspects of Alembic's electronics may almost qualify as rocket science).
Bill, tgo