Electric engravers

Does anyone know of a source of *quiet* handheld electric engravers?
We have two, marked Electro-Stylus, and reportedly purchased from
Efstonscience some years ago.  We would like to find more, as not
only are they quieter in operation, they are also considerably
lighter than current models, being without the heavier, wider
portion at the upper end.  Needless to say, Efstonscience has no
record of them. Any leads would be appreciated,

Helen Coxon
Royal Ontario Museum
Toronto
416-586-5897

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                  Conservation DistList Instance 11:69
                Distributed: Tuesday, February 10, 1998
                       Message Id: cdl-11-69-008
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