I don’t know how this compares to the sources that you’ve been using, but some of Ringo Starr’s US dubs were released on CD as part of an audiobook read-along set by Random House, sourced directly from the TV episodes themselves (not re-read like the 1985 UK Ladybird audiobooks). A few slight drawbacks with those is there’s a ‘beep’ whenever you need to turn the page and some lines of dialogue differ from the Strand VCI home video versions.
Here’s an example, “Wooly Bear” with Ringo Starr US Narration sourced from Random House read-along CD.