I had a 1981 36 and I am not positive but believe the port was made by Bomar. It was plastic with black closure knobs, had a lip on the outside maybe 1 inch. Either way, I got a new direct replacement at HMP in Toronto.
Len Mitchell C&C 37+ Crazy Legs Midland On. Sent from my mobile device. _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray