So this evening I was browsing Youtube and found the Snakes' version of the Randy Newman song, "Have You Seen My Baby." It's audio-only, but that's OK:
After that, I made a conscious effort to find the Snakes -- I found the one above when I was searching for Ducks Deluxe. So I have now found two more:
"Teenage Head" has never been one of my favorite Flamin' Groovies' songs, and I'm not particularly crazy about this version. But at least I got to hear it.
UPDATE: Just noticed that the cover from the Snakes' single (as shown in two of the above videos) was "Teenage Head" b/w "Lights Out." So I was wrong, above, when I guessed that the b-side was Little Queenie. I can't find their version of "Lights Out" on Youtube, and it does make me wonder where that recording of "Little Queenie" came from. I guess the search continues.