I don’t have a link for audio, but your post reminds me that Australian actor Tom Burlinson (The Man From Snowy River) did some of the vocals for the Sinatra mini-series several years ago, he sang the early-years tunes and man, if he didn’t sound just like young, floppy-bow-tie Frankie! If I recall correctly, Frank Sinatra, Jr. sang the later years tunes for the mini-series, no surprise to the similarity in that. But I was just surprised that Burlinson not only sang so like Frank, but no trace of the Australian accent whatever.
I know who Tom is. He was also in a BBC series about RAF pilots during the Battle of Britain called Piece of Cake.
Was he in the series as Frank? Maybe I could find it on Net Flix. I would lover to hear and or see that.
Yeah Frank’s voice when he was younger was golden.