I have a disk of 12 Al Pearce shows from 1939-40 (obtained from otrcat.com) and Mr. Kitzel appears on one as an IRS man, and another where he wants to take over as the announcer. There may be more. Mel Blanc appears on one show as well.
I have to admit that every time I've put this disk on, it's been when I was "just about to fall asleep" (in one case, I was suffering with a bad cold) so I haven't heard any of the shows all the way through, and the sound quality is not very good... But I'll try to listen carefully and make notes when I can.
My mother has told me for decades, "See if anyone has any Al Pearce shows" and the first item I found was a late 1950s "Suspense" that had a Ford commercial featuring "Elmer Blurt, the World's Lowest-Pressure Salesman." Then a company called Metacom listed one cassette, but it was no longer available or they went out of business.
Finally I came up with these, which start out, "Dole pineapple juice, from Hawaii, presents Al Pearce, from Hollywood..." (The announcer is "Wen" Niles.)