It existed - I had a burnt copy of it, once upon a time. I gave my Wagasuki cycle to somebody, and I just can't remember who it was. I know I didn't just toss them - I wouldn't do that.
If it's ANY consolation, it really isn't essential listening. It's more of a novelty because of the vocal soloists being so far to the back. it truly is the closest you'll come to a music-minus-one Mahler 8th.