Best watertight deck plates and hatches available. Check their sizes. Call them. Not sure if maybe two circular ones cut into a new facing piece would work for you?
http://www.armstrongnautical.com/dckplates.htm
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1978 23' Superfish/Potter Bracket 250HP --------
as "Americans" you have the right to ......
"LIFE, LIBERTY and the PURSUIT of a Classic SeaCraft" -capt_chuck
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