I am assuming you want the custom engraving to show up under the product specified… as in, if you have multiple custom products they each show what the lettering will be.
I am working on this solution as it pertains to a project I am doing as we speak, with the same situation. I may end up hiring Caroline, Jamie, Ryan, Gavin or any number of the helpful people here.
I added custom engraving to puplife a month ago.
Different products have different types of engraving, ie. different number of text fields, with different maximum number of characters, etc. My code engine is smart and flexible.
About 24 moons ago I added swanky engraving code to http://www.lucyann.ca too. Amazing that code still runs after all this time. If only I knew then what I know now, I’d do it different.
In the meantime I hired Caroline for this fix (urgent deadline) and could not be more pleased with her work.