I rebuilt all my S/W door latch mechanisms, and they work well, but I had do do a lot of filing and welding. BTW, the part that sticks out of the door and engages the striker plate on the door post is called the "bolt". On these latch mechanisms, the bolts are sold chunks of metal, but they are riveted to a much lighter stamped carrier, and the rivets could get loose. Then they would tend to flop around.
The repro strikers are pretty nice, but they may come with the wrong size bolt for attaching them to the door post.
Doug