If authentic is not important, it would be no big deal to modify a taller Savage sight by grinding it down, then working the white line in. It'd actually be a fun project. Plenty of $40 donor sights available.

This based on my memory of the details of a T rear, maybe someone could post a closeup of the white line to refresh my memory of if it's painted in a recessed channel or not.

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An 8 dollar driveway boy living in a T-111 shack

LOL