COLT SUPER MATCH REAR SIGHT

I HAVE JUST COME ACROSS A COLT SUPER MATCH PISTOL FROM A FRIEND WHO'S FATHER USED TO BE A COP. THE ONLY PROBLEM IS THAT THE REAR SIGHT IS MISSING( AS PER HIS FATHER IT CAME DURING A FIRE FIGHT, SNAGGED ON HIS HOLSTER AND WITH THE ADRENELIN PUMPING JUST BROKE IT OFF) IT IS SUPPOSED TO BE A STEVENS ADJ. SIGHT WHICH WAS CALLIPERED AT .405 AT THE WIDE POINT BY MY GUNSMITH CAN ANY ONE HELP ME LOCATE ONE OR SUGGEST SOMETHING THAT WILL FIT. THANK YOU FOR YOUR TIMR.

ROCKY R.