Ideas for fish box and lids in floor

[Steveib]

I bought a 1979 Wellcraft V20 not that long ago and it didnt have any doors over the fish boxes in the floor so I made some out of some wood I had laying around. thay didnt hold up for to long. i have to make new ones for it. What should I use where to buy it and hardware to use. The fish boxes in the floor fill out with water and the only way to get the water out is to bail to out. I would like to have it so I can fill them up and drain them with not that much hassle. Any info and pics would be a big help. Thanks