I have a 3rd gen S&W that needed some TLC. I found USA Guns And Gear online. They have everything to keep an older S&W running.
Absolutely EXCELLENT service and a collection of parts that rivals S&W warehouse. If you have an older firearm that needs parts, check them out.
Installed it today along with a new spring. Field break down is so easy. I put a aluminum dummy shell in and it make a nice solid deep hit on the rim. Happy I made this change.