Welcome aboard! Maybe post a photo of boat, and lamp, when you can.
We have a 1981 IG Europa 36. IGs produced by the Kong & Halvorsen partnership in Hong Kong stopped production years ago, later ones were built by Jiang Hua in China. I had difficulty buying "Crossed Flag" exterior badges I got from Mark Halvorsen. Lampshades with logo won`t be easy.
2005 Integrity 386 "Sojourn"