Google Play/YouTube Movies often sells the Miramax version. Before purchasing, look at the details section. If it says "Audio: English, Italian," you are set. This is a legal download (though streamed, not a standalone audio file) that you can keep in your library.
If you are looking to watch or obtain the English audio track, it is standard on most modern digital releases:
: Offers the movie with English audio available in Dolby 5.1.
a digital copy or physical media (DVD/Blu-ray) that contains the English dub.
Finding the right can be tricky because the film is famously Italian. While most viewers prefer the original Academy Award-winning performance by Roberto Benigni, an official English-dubbed version does exist for those who prefer audio in English over subtitles. Official Sources for the English Dub
You're looking for the English audio track download for the 1997 film "Life is Beautiful" (Italian: "La Vita è Bella"). Here's some information and a possible solution:
If you have downloaded an audio track separately and want to play it alongside the movie: