I know it can be disappointing..there's a guy in England who has loads of Sesame Street 70s episodes but he hates the show so he refuses to digitalize them... Apparently they're from a TV station over there, and two brief clips have turned up on YouTube earlier this year. I contacted him and asked politely if there's any chance of getting access to these, and he said, "Sorry, it's not going to happen." Yes, I was disappointed, but I certainly didn't throw a tantrum or threaten the man. I just let it be