No that will not fit at all, smaller diameter are the chinooks.
The chinook is about 13 mm , what he wants is 20mm plus.
its either original part or custom made.OR retrofit.
FOR Tassie guys there are two shops, one in hobart and one in launceston, both carrying heaps of spares and new gear.
Tassie knowledge is just as good as mainland

, windsurfing since 1983, unfortunately I can remember all the brands and pieces!