I bought a used Model 22-4 that didn't have any of the keys for the unfortunate lock they have now. Anybody that doesn't need thier anymore, let me know. I emailed S&W, but haven't heard anything from them yet. Hopefully, some day I will get one of the plugs, and take the darn thing out, but until then I guess I need a key in case the lock activates. Thanks for any help......

Call S&W customer service and they will send you a set for free. That is what I did when I bought a used 647 that didn't have any keys.