The "port holes" on our boats are actually called port lights. I guess if they are anything other than round they are port lights. Anyhow, Bomar has several port lights. I cant recall if Bomar was the OEM supplier for the Marinette port lights. I do know Bomar supplied the forward hatches on the 80+ Marinettes.
Check the site below and click on Online Catalog.
http://www.pompanette.com/bomar
-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors