22343 , 04076 and it's a .126 tall Blade (new style / complete assembly).
Rear sight leaf screw is #22457 (one screw needed)
It will be
about $70 bucks . S&W Brownells or MidwayUSA, it's your dime.
Here I located it on Brownells for you:
SIGHT ASSEMBLY, REAR, .126", NEW STYLE, WHITE OUTLINE FITS: 14, .38; 15-4, .38; 696, .44 Spl; 29-3, .44 Mag; 629, .44 Mag Price Range:$57.11 - $57.11 (
In Stock)
SIGHT LEAF SCREW, REAR, NEW STYLE FITS: 41, .22; 15-7, .38; 17-7, .22; 18-4, .22; 19-7, .357; 66-4, .357; 67-4, .38; 617-1, .22; 648-1, .22 Mag; 586-4, .357; 686-4, .357; 696, .44 Spl; 29-6, .44 Mag; 57-4, .41 Mag; 625-5, .45 ACP; 629-4, .44 Mag; 657-3, .41 Mag Price Range:$4.00 - $4.00 (
In Stock)