Working on the same project
Danny, We have a 79 H30 and are in the process of installing all new portlights. I guess we got lucky in that we had no problems with leaking. When we removed our old portlights the exterior trim rings did not come off intact. Mind you, we weren't exactly trying to get them off intact, but the sealant was so tenacious and the trim ring so brittle that saving them would have been impossible. The original portlights were manufactured by Gray Industries and are still available. We ordered ours from Sailnet.com. As a matter of fact, the BOMG512AD27 portlights (size of 4 smallest)are on sale right now for $59.00. That's a white frame with clear lens. Maybe you could order just the exterior trim ring, but you would have to fill all the holes because the new trim rings aren't screwed in place, they are held in place by sealant. Good luck.