The Lewmar 'Ocean' series ports are rated for in-hull use. They do need a
nearly flat mounting surface.

New Found Metals, Port Townsend, Washington makes very high quality ports.

For a difference check out the portlights made by the Fuller Brush Company.
http://www.fuller.com/ You won't find them listed on the main page. Go to
their search function and search for "marine".

Rusty O