There was a Bootleg Beatles performance on Youtube from a 1994 Japanese TV special, closest sound to the lads I've ever heard! They did All My Loving, She Loves You, A Hard Day's Night, Help!, Day Tripper, Taxman, Hey Jude, Helter Skelter, Get Back and maybe some others.
Paul Cooper had Paul absolutely nailed, and when Neil Harrison sang harmony (particularly on DT and GB), it was as close to sounding like The Beatles as mere mortals could get, IMHO - wondering if anyone has seen it? I'll be sure to put up a link if I ever come across it again.