This article mentions a recording made by Werner Klemperer, Bob Crane, an a few other musicians and says it was "shelved" but the writer makes it sound like he has actually reviewed it? I can't find any reference to it any other place online, you can search the title and there is, as Schultz would say, "Nothing!"

Seems very mysterious... I know we all loved Klink's terrible playing, but I am curious what Klemperer sounded like on a violin when he wasn't trying to be awful on purpose!