VIN Rivets

What do the early ones look like? I bought a set from ECS for my 72 (I took the tag off to repaint the dash). those were sort of floral shaped with rounded edges
I need a set too. But the prices are high. I thought about taking my jewelers file n try to make a couple of them. I have a lighted magnifier on my bench n it seems to be doable. I did a few test sets n each set I do comes out better n better The only thing is I need to repaint mine n put back on the Chrysler ink decal
Anyone else trying this too?