First of all, unless I'm greatly mistaken, there was not a Christmas shopping episode done on December 12, 1954. I say this with confidence because I have the script from that date, and it is the first television version of Jack going grocery shopping, not Christmas shopping. Mel Blanc isn't even in the episode. If anyone wishes to verify that I'm telling the truth, go to www.tobaccodocuments.org and type in Jack Benny. You can download scanned copies of the actual scripts from all of Jack's television and most of his radio shows for the 15 years that he advertised Lucky Strike.
Secondly, to the best of my knowledge, the only version of the Christmas shopping episode that is available to the public is the last version, filmed around 1960 (I don't have the script for that one). I do have a script for a television Christmas shopping program from 1957, and while there are many similarities, it is not the one that is readily available. Unfortunate, because I'd love to see it. Incidentally, I believe I have seen a brief clip of it on Eddie Carroll's website.