Where can I find a old rare movie called un largo retorno in english?

Where can I find a rare movie called un largo retorno in English? I’ve been looking forever. My pal on YouTube found the movie on eBay in three versions. It's not available on eBay anymore. Where can I find it in English, the English title is A Long Return or A Long Returning, it stars Lynne Frederick and Mark Burns and it's directed by Pedro Lazaga. It does not matter if it's on DVD or VHS. Please Help Me