vent louvers?

[Miles Offshore]

hey all, I need some new vent louvers for the outside of my 78. Anyone know where i can order some of the same style?? All the newer ones I can find have a slightly smaller width than the originals as well as a different screw pattern. I used one on a badly damaged one on my stern but it was a pain in the ass filling in the old screw holes and trying to make sure the old hole was completely covered. thanx- craig