I also have the arthritis problem. I ended up buying a Taurus stainless model 856 w/3" barrel and shoot .38 specials in it. The frame size is more like the S&W J frame but instead of 5 shots, it is a 6 shot. It weighs 23.52 oz unloaded. Works well, shoots well and conceals well, plus it is a...
Take it to your local gunsmith and let him look at it. If SW is dragging their feet, your could just replace the cylinder yourself or have your gunsmith do it. Smith & Wesson Model 629 Revolver Parts | Gun Parts Corp.