Numrich has it for $8.00, listed as in stock. Midway has it on clearance for $2.93, with one left. Midway doesn't list the CS9 itself, but the CS9D for that part. I took a look at the S&W parts list and it shows the same part number for both parts. You can also call S&W to see if they have it. Their part number is 263200000. They list 239020000 for the plunger.

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