OK fellas I am after a little help I am trying to find a plug for the brake on my 460 see below for pic of what I mean

The brakes are fine and dandy for reducing felt recoil however they make the gun a fair bit noisy and are PIA to clean,
Now I know that S&W made them as aftermarket parts but they seemed to have stop making them now, so what I am after is if someone spies one for a 460 to let me know, if its not too dear then buy it and let me know and I will send the dollars over to cover + postage to me and a small tip as a thank you.
Does any one here have a 460 or a 500 and use one of these plug by chance?