The relays should be available closer than Europe, and any starter and alternator shop should be able to rebuild or replace that motor for 2-3 Benjis. The starter shop people will have a source for correct relays which should be continuous duty type. Often the auto parts stores will sell you Ford starter relays which will work, but are not continuous duty so they will not work for very long.
I realize that the internet is the new way of things but really this is a job for your local starter and alternator guy.