There's no need for an exact match.  They won't be visible unless the box is open other than the lever on the latches.  Brass and brass-ish will work just fine 😎

I've got a second one on the docket now for my mom.  Completely different design but I'll likely do some of the work in parallel like milling and ripping.  Mos' project post gave me the finishing touches I was looking for on the design 😁