Determination has finally thrashed senility and I remembered to get the
name of the vendor who does repairs on windup phono springs.  Their ad
material implies that they custom cut the springs, so it seems likely
that they can replace (or lubricate) springs in disk and cylinder boxes
as well.

    Antique Phono Supply Co.
    P.O. Box 123, Rte. 23
    Davenport Center, NY 13751
    607-278-6218

I have found them to be most helpful, at least in setting up
phonographs.
                        A. B. Bonds