Those of USn's not fortunate enough to have been around in the UK at the time of 'Beyond the Fringe' and 'The Goon Show' are, however, latterly blessed by NPR's weekly offering "Weekend Radio" (produced in Cleveland, of all places) where skits from same are regularly run. That's where I first heard the Tarzan skit and was amazed (having known little of Dudley Moore prior to that) to learn he was the auditioner in question.

PS: Two weeks after Spike Milligan died earlier this year, "Weekend Radio" devoted half a program to him.