I liberated this Jurassic age Windrush Fun 11 from the local tip. It's in reasonable condition and I'd like to get up and running. I've got a mast but the base fitting doesn't match the sliding fitting on the board.
Perhaps someone might be able to help me get hold of a suitable fitting.

Hi there
Im a newbie to the sailboarding side of Seabreeze.
I found this old Windrush Fun 11 on the Hobart tip. It seems to be in reasonable condition and I'd like to get it up and running. I've got a few masts and some old sails and booms but am missing a mast foot/ extension that would allow me to fit the mast. The one in the picture doesn't fit.
If anyone has one laying around surplus to requirements and would like it to go to a good home I'd be most appreciative.
Cheers
Nick