I competent welder can repair that. Since the damage is on the name and not the serial number, the entire name can be filled with weld material to restore the strength of the tube. The caveat is that you can not leave the suppressor at the welder, you will have to arrange a time that he can perform the repairs while you wait; literally by his side according to the law.I know you can get suppressors baffles replaced by other manufactures, but the serialized tube is gonna be hard to replace.
If the serial number area cracks, get a new piece of material, have the serial number engraved on it then have that welded as a patch over the original serial number.
This can be performed in a couple of hours for a couple hundred dollars. Less time and money than a new stamp for a replacement tube.