I don't know what the rules are in UK these days, but in EU you can always deal with the seller (assuming they still exist). That would be guaranteed to be free for you. If they want to import replacement they can do that & deal with the customs.

https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CEL... & https://europa.eu/youreurope/business/dealing-with-customers...