I lost 1 of my Cowl's in the lake recently, they are the original Vetus that just push into the Dorade on my 1991 MK 1.5 Hull #1168. I looked into replacing them both with the screw down type from Catalina because the kids knock the off all the time but at $100 each I thought I would see if anyone has and old one sitting around they want to get ride of that I could clean up.
https://www.catalinadirect.com/shop-by-boat/catalina-36/hull-deck/midship/copy-of-cowl-vent-c-34-c-36-c-42-wthreaded-ring-4quot/