Here's one courtesy of the Live Almanac's YouTube channel! On the Japanese tour in October 1968, one of the concerts was filmed (most likely during the two day, three concert stay at Budokan Hall in Tokyo on October 3 and 4, 1968) and later broadcasted on Japanese television. This recording, however, has never been officially released. The audio of it (straight from the video) does exist as a bootleg and is why we can hear cuts like the one below, but the video footage is presumed lost or destroyed.
During the performance of "Salesman" and some other numbers, Davy played bass while Peter moved to keyboards. I'm a big fan of the Japan '68 bootleg...really wish it had been preserved more carefully.