My first idea was to buy an off-the-shelf strike plate similar to what was original but more robust.
But after considering the off road boondocking stress I would be putting on it I could foresee a deep grove being worn into the latchbolt from the thin striker edge.
zit would be best to build my own striker with a long tongue and broad surface for reduced wear and spring tension.
I started with a 1/8” Stainless Steel plate and cut it to size. It also needed a lip to cover a cutout in the doorframe.
Our next door neighbor had a full carpenter shop and a commercial milling machine.
He was kind enough to mill out the striker pattern.
I had to put down the camera to oil the bit 🤣
We also switched to a more aggressive bit
Ready for the mounting holes