I have one of the above pistols. The rear sight is adjustable for height and windage (on many 226 models the sight is fixed). The blade is held in place by a screw which also adjusts the windage and has broken where the screw passes through so can no longer be held in place.

I have tried temporary repairs using "plastic' metal formulas which set solid but the blowback is so strong that they have only lasted about three shots.

Google has not been my friend and I cannot find where to buy a replacement blade - any ideas please?