Saving a Louis Brandt perpetual calendar

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I obtained a louis Brandt perpetual calendar 1118.

Finally getting around to attempt to resurrect.
Movement complete, keeps good time. Dial needs attention.
I assume the case unfortunately is missing, and I suspect it was melted down. Does anyone know if I could obtain a replacement case? My second option would be to locate a case maker to fit a case.

For the time being, fitted a 2892a2 multifunction case I had . Fits well but obviously the pushers dont line up.
Appreciate any input.