A "TALLER" front sight is needed. T/C has them. If your rear sight is adjusted all the way down and it is still shooting that high I would ask for the tallest front sight they make. This should put you dead on at the same distance with rear sight readjusted to somewhere in the middle. If it is too tall you can always file it down to size, but not necessarily the other way around if they send you one that is still too short.
The taller the front sight, the more you have to point/angle the muzzle down to get it to line up with the rear sights, thus bringing your shots down. If you need it to be even taller than the replacement blade you could solder on a piece of "BRAZE ROD" to get it up there, the brass coloring also makes for easy sight pick-up due to contrasting colors.