I spent the evening listening to a concert version of Act III of “Siegfried” performed by the Chicago Symphony Orchestra under Sir Georg Solti on April 16, 1980, which I haven’t heard since I recorded it off the air 25 years ago. It’s a pity the CSO doesn’t release something like this on CD because it’s a fabulous performance. Dennis Bailey as Siegfried; Berit Lindholm as Brunhilde; Franz Mazura as Wotan/the Wanderer; and Birgit Finnila as Erda. I don’t believe any of them made commercial recordings in those roles, although I could certainly be wrong.
For those who are interested, the recording is in the Rosenthal Archives of the Chicago Symphony Orchestra, AV-CSO-360. Tell them I sent you.