Originally Posted by spartacus
The original was probably made of 5mm plastic with rounded end sections that fitted in the rubber recess patches on the tubes. I have a Zodiac MkII CGT on the west coast that uses exactly the same thing. Another member on here may be able to assist and give you a template to make one. I'd have done it for you - but I'm no where near the boat.
I guess you could try the blue water pipe small stuff .
fashion a small piece of wood to fit into each and and reduce the ends again to fit the sockets.