To fix that hammer I would remove it from the lock & weld a piece of steel to it then shape it & cut checkering grip on it to match the other.
You retain engraving this way & have the correct hammers.
To replace hammers is easier said than done because they are timed & shaped to fit the tumbler on a square & that is an individual thing.
O.M

Last edited by moses; 12/24/16 06:15 PM.