Hey everyone,
Four years, and I think I finally found it! Although alas, it
might not be quite the blooper we thought it is.
The full recording comes from a 1974 film directed by the American director Kermit Schafer titled
Pardon My Blooper. It can be heard around 15 minutes into the film, which may or may not be publicly available on some places. This is by far the oldest reference to the audio I have found by far and is exquisitely crisp. Kermit Schafer's work does date back to the early 1950s, but although I tried my best to search through these using the Internet Archive, OpenAI's Whisper model for transcription, and grep, I couldn't find any references to Israel, lesbians, the "Lesbanese", or the Lebanese.
One thing that I should mention is why I am claiming the clip comes from the movie itself and not some even older yet unknown source. The reason for this is that allegedly, Shafer had a record of simply rerecording anecdotal bloopers if he couldn't get a source for them. This means that for all we know, the blooper may have originated from someone long since passed away, been telephoned into what we hear now, or just made up for a laugh.
Nonetheless, I'm quite pleased with the results and I hope anyone interested in the search is too. I can't attach the excerpt to the post however those interested can find it in the aforementioned film.
Also, I got all the other audios located:
BD2K3_JA.wav - This is the
Neighbors theme song
BD2K3_JB.wav - This is the
sixth Doctor Who theme. I really should've figured this out as soon as you mentioned British TV

BD2K3_JD.wav - It's Star Trek.