Such a find are no longer common, if they occur at all.  Reginas
are very common disc boxes.  Why not look for other types of disc
boxes, like Olympias, Adlers, Polyphons, etc.  These are very nice
disc boxes and not as common, and therefore you may obtain a Cadillac
or a Mercedes, rather than getting an average Chevy, a 15-1/2" Regina.
I do have 4 Reginas, but they are all rare music boxes, and I would
consider parting only with my 11" Regina, but not my 27" casket, 27"
changer, or my 20-3/4" short bedplate desk model (style 61).

Thanks
Larry Greenfield

P.S.  If I do not respond immediately to music box enquiries, it is
not for lack of interest, but for lack of time.  I review my email once
or twice a week.