I understand the rule of not ordering a government free marker for someone who has a readable stone already. However, my great grandfather's is now becoming unreadable and we as a family would like to just purchase some kind of metal (or otherwise) addition stating his services in the CSA so his grave will be marked for posterity to know. How can we proceed? I guess we could just take down the old stone and purchase a new one with what we want it to say? Is this the only way?