Yep I replaced the old plastic ports for Bomar aluminum. They were slightly bigger so had to re-size the holes with jigsaw and either metal or carbide blade (neither work really well because of the wood/fiberglass mix, but it eventually does the job)
And then I also found that, to my aesthetic taste, the boat had too much ports and removed the forwards ones and rebuild the deck in those place... not the most useful job onboard but well, I like it now;P