was it Pachmayr or Tyler? they look like the others but will have the 'S&W' logo on the side of the grip adapter...see them at gun shows from time to time, they we're more popular many years ago.
I've got one or two of them around here. They are marked S&W but I think they are made by Pachmayer. They are made of a plastic material and resemble the Pachmayers in size and substance.
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