I asked this question some time back and didn’t have any luck, but I think I have enough information to make it a bit less obscure.
Back in the glory days of Napster and other file-sharing apps, I (ahem) *acquired *a track which has become, bar none, my favorite recording of Au fond du temple saint. Unfortunately, other than the title, I have no information about the recording, and have been unable to track down who the performers are and where I can get an authorized copy. To my ears, and to those of a friend far better qualified than I, it sounds like the baritone part is being sung by Placido Domingo. Now finding a recording of Domingo singing the tenor part is simplicity itself. But singing baritone is a different matter. My Google-fu is failing me in this matter. Can any of our resident opera mavens point me in the right direction?