Hi Mark and welcome. To suggest that machine is ancient would be an understatement. Is there any chance that one can be fixed? The only way I would imagine finding a part is if someone found one in an estate sale.
Welcome. If ereplacementparts.com doesn't have it, you are unlikely to find parts of any kind for a machine of that age. Stanley today isn't like the original company. If you can't find the part, or a used machine somewhere as suggested, then the time for you to retire your old friend has probably arrived.
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