A year later update, if anyone is interested (Dogberry ?) - I found a nice 150UX that came with a Panolux and another aluminum case! So now I have the full kit for my 175UX. Unfortunately, the camera needs a service.
If anyone has experience with the Panolux, please let me know. I may try it for the first time tomorrow, if I can figure it out.
Oh, I believe the case manufacturer may have bee “Rimowa”.