I don't know if anyone here has sought out Bill Alexander's Magic of Oil Painting episodes, or how much success you've had. Alexander Art has some half-hour shows on YouTube, but they seem to have been recorded after Bill went off the air? I actually wonder how many Magic of Oil Painting episodes are still extant. It was a pretty common thing back in the '70s to tape over a program once it had aired, and even when the tape still exists, the tape degrades over time. I sent a note to Alexander Art and KOCE, separately, asking about how many episodes remain, but I never heard back.
I find Bill interesting in opposite ways from how I found Bob interesting. Bill is probably technically more proficient, but of course Bob is more affable and clearer as a teacher. I mean tempermentally, not just the thick Prussian accent. Bill always seems on the verge of mania.