Transom question

[Trayder]

Fabricate a new section to raise it the five inches. Grind away the glass on the existing transom to form an area for the new glass to hold. Place your fabricated section into the notch of the transom and glass it in place. Refinish as necessary or fabricate an aluminum or stainless brace that would encapsulate the new addition, it would wrap around the transom, and spread the load out onto the existing transom.

I am sure there are other ways but this was the first that came to mind