I dont know the OEM maker but you'd be able to get one from essexboatyards spare parts service, run by the very nice and helpful heather surgett. there's a link on their website or you can email her directly. Her email (written anti-spammingly!) is first-name-only at essexboatyards dot com. It helps to send her a photo of the part you want (though might not be needed in this case - dimensions might be more use) and the HIN of your boat.