I’ll second the KUS Marine. Emailed them to confirm which model and gasket material. Very responsive and quick to ship. Install was simple as previously stated. Ordered a matching plug from Amazon and wired it up on the bench for a plug and play install.
Had all the cushions on my 23SE redone a year or so ago by a guy I know in Columbia who does upholstery. Very reasonable and did a great job. Let me know if you want his contact info.
I also went with Laporte. This is our 2nd Laporte cover. First one sold with our previous boat. It was 10 years old, covered year round in SC, and still going strong. This cover is on a 2015 23SE.