Actually, the whole production was a joy, and I was never quite sure why TBS didn't air it as an annual special, especially considering that they regularly ran the MGM film each year and made a big deal. I'm not even sure if they even re-ran it once. (If they did, it was incredibly limited, most especially since cable usually re-airs specials about 20 times over the next week.) Maybe they only had the rights to it for one performance. I can't believe that the ratings would have been so horrific that they canceled subsequent airings. Who knows?
It was officially called, The Wizard of Oz in Concert: Dreams Come True, and it was done as a benefit for the Children's Defense Fund. A cast album was released on CD (though I think it's out of print), and it was later released on VHS, but there was never a DVD of the production, I've never seen it again on TV. At the very least, I thought that when Jewel became a huge star, TBS would have put it on again. Or that there'd be a DVD. But as far as I know -- no.
Here though are six minutes from it with all the principles. It mainly features Nathan Lane -- chanelling Bert Lahr,, though you get plenty of Jewel to see what an impressive job she does (and pretty much without a script in hand, like the others). Plus, some of the original introductory lyrics that weren't used in the film.