Well a stroke of look has come my way, a fellow forumite has just sold me an unused set of legs so that's the winter project binned.
Thanks for everyones help and hopefully it will be useful for someone else.
The thought of possibly selling mine, unused for 10 years, has crossed my mind. One problem is that the hull fittings are on the boat in Greece, so I contacted Yacht Legs Co. to enquire about the availability of another pair. I have been told that although the legs are no longer being made, the hull fittings are available at £185 per pair inc. VAT.