Hucky BMW sells ID Frame plates. They aren’t the same as the original plates but they look good and seem like they are made by BMW. The old name plate showed some wear and tear and would look odd against a brand new frame (even though it is tucked behind the forks).
I thought about keeping it on there for legacy… but for $17, might as well put a new one on there and keep the old one as a memento.

I ordered a set of 5/32″ letter and numerical dies/stamps from amazon for $16.

New ID plate

I had a piece of dowel in the garage that was similar to the arc of the steering tube that the name plate mounts to. I used that as a surface hold the plate while tapping the numbers in it.
But damn, it is hard to line those numbers up… and not slip when tapping them in. Of course I slipped on the second to last number and that one digit is out of registration compared to the others.

1/8″ 3mm Rivets seem to do the trick. I rarely use my Rivet gun but when I do, it is one of those tools I’m glad i bought. I think the 1/8″ rivets are left over from my last restoration.

I used a long socket to push the cap of the rivet into the frame as far as it could go.

Done.