odd that **both** of them are apparently missing from the archive
Probably not a coincidence. When you look at the couple dozen that appear to be genuinely missing from the archive, a number of them are notable for one reason or another. The only Bob Hope appearance, the election special with three huge guest stars, the transitional episode from Garry to Steve, and these two, for example. My impression is that back when these films were gathering dust on the G-T shelves, important people who had access may not have seen a big problem with just helping themselves to them. (It's interesting, for example, that the election special is missing, and it's the one episode that Gil Fates goes into complete detail about in his WML book.)