Find trimark on facebook and post a rant.
File with the NHTSB for a saftey issue:
https://www-odi.nhtsa.dot.gov/VehicleComplaint/
And perhaps you will get your money for the new lock back.
Mine broke at a gas station. 4 souls who could not get out of the RV in the case of a flash fire.
If a magnet won't stick to your striker, its zinc potmetal. If it will, its steel. The steel is also generally shiny and the zinc is dull.