Help needed: firewall plates wanted

[Ivan141]

You are thinking of number punches, but looking at a picture of a factory plate I suspect they are engraved.
[edit] banpei just beat me to it.. the second pic shows punched writing
So that would be the best way to do it, probably best to have it done by a specialized company.
Just google typeplaat graveren and you'll find some dutch shops that do it..
Might not look exactly like the original but much better than what you'd get by hand.