I had a CZ452 American I decided needed irons. I used a NECG R-100 Masterpiece banded front ramp with a R-108-3 sourdough blade insert.
The 'smithing on that front banded sight was done by myself, and it was the best example of that kind of work I ever did; it took me quite a while and a lot of trial fitting to get it done. I got a good shrink/driving fit on it and then for insurance applied some of the appropriate wicking green Loctite for shafts, etc... that thing might as well have been integral with the barrel by the time the job was finished.
But the time and trouble cured me from ever wanting to do the job myself again!