I don’t recall anything special being done for the final KUHA signoff. They just ran the loop all day July 15, 2016 announcing that “Classical music will no longer be heard on 91.7” and redirected listeners to 88.7 HD-2 as well as the streaming app…and at the end of the day, pulled the plug. The station was off the air for two weeks while a new transmitter was installed and the STL to the KSBJ/NGEN studios put in place (I think KUHA was still using the original transmitter from the big KTRU upgrade in 1990.)
I also have a tape of the KUHA redirect loop as well as the initial “K-Dance” stunt on the new KXNG, but no current way to digitize…my cassette decks wore out with age and use, and the small number of players still on the market are either cheap junk or stupidly expensive. One day I’ll get around to seriously looking for one, but I don’t see cassettes having a vinyl-like renaissance.