Go to your local Big Lots. Grab the bucket from the mop section. It's $2.80 so you may have to raid the coin tray for this one.
Open your hatch and test fit. Aww shucks the handle won't allow the hatch to close.
Grab your Dremel and cut that sucka off. Then round off any sharp edges.
Test fit again.
Ahh much better. Nice and flush. Here you can see the spout end sits higher. Good news, the hull sits lower toward the rear. Point the spout ( hint: the pouring end ) towards you. Almost a perfect match. Like it was meant for our O.K.'s.
Product review: I got to try it out at this weekend's Rockfish Derby. Caught a couple rockfish and stored them in the hatch bucket. When time came to unload I didn't have to flip the kayak upside down and shake it to dislodge any stuck fish. No slime, no scales, no more smelly hull. Teh bucket iz win!