Heres the (grey) ports page from my Watkins Owners Homepage: Grey ports (links to Bomar)

The ports on my 1972 Irwin 37 are made by the Fuller Brush Company.(click on left column (about our portlights) Fuller Brush Company

Leaking port gaskets check out Becksons trouble page

Atkins and Hoyle websi te

Suppliers of discounted products, discontinued items and seconds: The Thrifty Mariner

Ports and Hatches Replacement: Select Plastics

From the T-30 Page, which sealents for pexiglass ? (avoid polysulfides for pexiglass) http://members.aol.com/T30SAILOR/m30caulk_po rts.html