The Canadian Seafires carried the same two tone grey color scheme as Canadian Sea Furies. A book that covers the subject really well is The Supermarine Seafire in the Royal Canadian Navy by Leo Pettipas. Do a search at ABE Books or Bookfinder.com and you might find a used copy. They are not cheap! Canadians used the Seafire XV. You could convert an existing spitfire plan but it would involve a lot of research as the XV was a hybird of several Spitfire marks.