Rafael from PA
If you want to be able to keep the stamp, can't you just cut off the mark and rivet it to the top of a new iron?

That method only requires sawing, drilling and hammering.

In this video, around second 5, you can see a nib added to a repurposed iron for a mitre plane. The nib is attached with pins.

https://youtu.be/1lQLFfQwEXA