Think it will be either a long wait or a lot of luck finding a black Sansin skewer. There’s a few silver ones about that look like the same design could maybe have a coat of black paint and stand in for the “right” one. It’s always the little parts like that that are the hardest to find!
The pedals look like a later replacement?
What’s the plan for the paint? It looks like it would come up nice with a gentle compound and wax avoiding the decals. I’d be itching to try a patch to see!