I bought these flush fittings from Eric Schade of Shearwater Boats and installed them on my Arctic Tern. You can either get plans for $2 and make them yourself if you have a lathe and drill press, or buy the fittings ready-made (as I did) for $7 each. It's pricier than cheap pad-eyes, but worth it, I think. Approaching the deck of your kayak with a hole saw is a bit nerve-racking, but I didn't have any problems. Just measure twice, cut once. The fittings mount from the backside, and you just trim them flush with the deck surface.

Another image to take a look at is: http://www.shearwater-boats.com/feye1.jpg

Dean