I'm thinking the front sights sold by SS have enough meat to dress them down to the barrel contour.  And after sweating it in one should be able to come up with something close to what the armory would have produced.  The question I have now is would it be best to solder the base on first then dress it down or do it the other way.  That is file the base round and then soldering it in place.  If I did that I would be sure to clamp the base into the dovetail.  However, either way looks like it would require re-bluing the barrel to make a clean presentation.