Door latch

Have you taken it apart to see why it failed yet? If not I would do that first. I have had 4 failures in the Trimark latch in 16 years, the first was on a trip and I bought a broken one at a salvage yard and was able to fix the dead bolt that would not retract. The next one failure was the plastic cam which retracts the door latch and I replaced it with a part from the salvaged lock. The last two were the door latch itself. I bought a new door lock but it had the same Zinc alloy latch that is very weak and broke again in about 5 years. I certainly was not going to spend another $100 plus for the same latch with the same Zinc part that broke last time. I ended up just adding a steel backing plate that joined the broken pieces together and so far has lasted more than 5 years. If you decide you just want to replace it rather than repair it make sure the latch is not a cast zinc alloy, most of the replacement latches are that I have seen.